Identification_Information: Citation: Citation_Information: Originator: R. W. Tabor Originator: D. B. Booth Originator: J. A. Vance Originator :A. B. Ford Publication_Date: 2002 (paper copy); 2006 (digital database) Title: Geologic Map of the Sauk River 30- by 60 Minute Quadrangle, Washington Edition: 1.0 Geospatial_Data_Presentation_Form: vector digital data Series_Information: Series_Name: U.S. Geological Survey Miscellaneous Investigation Series Issue_Identification: I-2592 Publication_Information: Publication_Place: Menlo Park, CA Publisher: U.S. Geological Survey Online_Linkage: http://pubs.usgs.gov/imap/i2592/ Description: Abstract: Abstract: This digital map database has been prepared by R.W. Tabor from the published Geologic map of the Sauk River 30- by 60 Minute Quadrangle, Washington. Together with the accompanying text files as PDF, it provides information on the geologic structure and stratigraphy of the area covered. The database delineates map units that are identified by general age and lithology following the stratigraphic nomenclature of the U.S. Geological Survey. The authors mapped most of the bedrock geology at 1:100,000 scale, but compiled most Quaternary units at 1:24,000 scale. The Quaternary contacts and structural data have been much simplified for the 1:100,000-scale map and database. The spatial resolution (scale) of the database is 1:100,000 or smaller. Purpose: This database depicts the distribution of geologic materials and structures at a regional (1:100,000) scale. The report is intended to provide geologic information for the regional study of materials properties, earthquake shaking, landslide potential, mineral hazards, seismic velocity, and earthquake faults. In addition, the report contains information and interpretations about the regional geologic history and framework. However, the regional scale of this report does not provide sufficient detail for site development purposes. Supplemental_Information DIGITAL COMPILATION- R. W. Tabor scanned, vectorized and edited the geologic map information from stable ink-on-mylar author compilation at 1:100,000 scale. ARC/INFO vectorized coverage of the geology was later edited by K. Nimtz with assistance from Taryn A. Lindquist. The digital compilation was done in versions 7.1.1 through 8.2 of ARC/INFO with version 3.0 of the menu interface ALACARTE (Fitzgibbon and Wentworth, 1991, Fitzgibbon, 1991, Wentworth and Fitzgibbon, 1991). BASE MAP-The geology of this dataset was mapped on dimensionally stable chronflex prints of the Sauk River 1:100,000 scale topographic quadrangle. Although no base map material is included in this dataset, a vectorized version of the base can be downloaded from http://edcftp.cr.usgs.gov/pub/data/DLG/100K/S/. SPATIAL RESOLUTION- Uses of this digital geologic map should not violate the spatial resolution of the data. Although the digital form of the data removes the constraint imposed by the scale of a paper map, the detail and accuracy inherent in map scale are also present in the digital data. The fact that this database was edited for a scale of 1:100,000 means that higher resolution information is not present in the dataset. Plotting at scales larger than 1:100,000 will not yield greater real detail, although it may reveal fine- scale irregularities below the intended resolution of the database. Similarly, where this database is used in combination with other data of higher resolution, the resolution of the combined output will be limited by the lower resolution of these data. Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2002 (paper); 2006 (digital database) Currentness_Reference: 2002. Status: Progress: Complete Maintenance_and_Update_Frequency: As needed Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -122.009731 East_Bounding_Coordinate: -120.980508 North_Bounding_Coordinate: 48.512953 South_Bounding_Coordinate: 47.986880 Keywords: Theme: Theme: Place: Theme_Keyword_Thesaurus: none Theme_Keyword: alpine glaciation Theme_Keyword: Bald Mountain pluton Theme_Keyword: Barlow Pass Volcanics Theme_Keyword: bedrock geology Theme_Keyword: Bell Pass melange Theme_Keyword: Cascade River Schist Theme_Keyword: Cascade Pass Family Theme_Keyword: Chaval pluton Theme_Keyword: Chelan Mountains terrane Theme_Keyword: Chilliwack Group Theme_Keyword: Chiwaukum Schist Theme_Keyword: Cordilleran Ice Sheet Theme_Keyword: Cyclone Lake pluton Theme_Keyword: Darrington Phyllite Theme_Keyword: Darrington-Devils Mountain Fault Zone Theme_Keyword: drainage diversion Theme_Keyword: Eastern melange belt Theme_Keyword: Easton Metamorphic Suite Theme_Keyword: Easton terrane Theme_Keyword: Eldorado Orthogneiss Theme_Keyword: Entiat Fault Theme_Keyword: erosional landscape Theme_Keyword: fault offset Theme_Keyword: Fraser glaciation Theme_Keyword: geologic history Theme_Keyword: geologic structures Theme_Keyword: geology Theme_Keyword: glacial geology Theme_Keyword: Glacier Peak Theme_Keyword: Helena-Haystack melange Theme_Keyword: Hidden Lake stock Theme_Keyword: Jorden Lake pluton Theme_Keyword: Index Family Theme_Keyword: landslide deposits Theme_Keyword: Marblemount pluton Theme_Keyword: Magic Mountain Gneiss Theme_Keyword: melange Theme_Keyword: metamorphism Theme_Keyword: Mount Stuart batholith Theme_Keyword: Nason Ridge Migmatitic Gneiss Theme_Keyword: Nason terrane Theme_Keyword: Nsapeequa Schist Theme_Keyword: North Cascades Theme_Keyword: Northwest Cascade System Theme_Keyword: radiometric ages Theme_Keyword: rock samples Theme_Keyword: Shuksan Greenschist Theme_Keyword: Slate of Rinker Ridge Theme_Keyword: Sloan Creek plutons Theme_Keyword: Snoqualmie Family Theme_Keyword: Straight Creek Fault Theme_Keyword: stitiching units Theme_Keyword: Sulphur Mountain pluton Theme_Keyword: surficial geology Theme_Keyword: Swakane Biotite Gneiss Theme_Keyword: Swauk Formation Theme_Keyword: Tenpeak Mountain pluton Theme_Keyword: terrane overlap units Theme_Keyword: Tonga Formation Theme_Keyword: transtensional deposits Theme_Keyword: Vashon stade Theme_Keyword: Volcanic rocks of Gamma Ridge Theme_Keyword: Western melange belt Theme_Keyword: Yellow Aster Complex Theme_Keyword_Thesaurus: none Place: Place_Keyword_Thesaurus: none Place_Keyword: Pacific Northwest Place_Keyword: North Cascade Mountains Place_Keyword: Sauk River Place_Keyword: Washington Place: Place_Keyword_Thesaurus: Augmented FIPS 10-4 and FIPS 6-4, version 1.0 Place_Keyword: Snohomish Place_Keyword: Chelan County Place_Keyword: Skagit County Theme_Keyword_Thesaurus: REQUIRED: Reference to a formally registered thesaurus or a similar authoritative source of theme keywords. Theme_Keyword: REQUIRED: Common-use word or phrase used to describe the subject of the data set. Access_Constraints: REQUIRED: Restrictions and legal prerequisites for accessing the data set. Use_Constraints: REQUIRED: Restrictions and legal prerequisites for using the data set after access is granted. Native_Data_Set_Environment: Microsoft Windows 2000 Version 5.0 (Build 2195) Service Pack 4; ESRI ArcCatalog 9.0.0.535 Spatial_Data_Organization_Information: srgeology is contact, fault, and polygon coverage; srlines is fold axes, cross-section lines, river-cut terrace boundaries, and mineral isograds; srfoldsym is location of map symbols for folds and arrowheads indicating direction of plunge of large folds; srsamp_smoc is locations of age, fossil, and chemically analyzed samples and locations of small outcrops of ultramafic rocks, limestone or marble, and Vedder Compex too small to show at map scale; srcleavage is zone of well developed foliation in western and eastern melange belts; srdikes is areas underlain by numerous granite and granite porphy dikes associated with the Pilchuck stock and Bald Mountain pluton; srstructure is structural symbols: bedding: foliation, lineation, and fault balls (These symbols will not show on screen or plot without appropriate symbol sets available in Alacarte); srrocksamp is a point coverage of rock samples archived at North Cascades National Park, Marblemount. For more information about the rock samples contact the curator at Marblemount, telephone 360 873 4500. Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: Vector Point_and_Vector_Object_Information: SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: Complete chain Point_and_Vector_Object_Count: 6041 SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: Label point Point_and_Vector_Object_Count: 2330 SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: GT-polygon composed of chains Point_and_Vector_Object_Count: 2330 SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: Point Point_and_Vector_Object_Count: 3 7 SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: Label point Point_and_Vector_Object_Count: 0 Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Planar: Map_Projection: Map_Projection_Name: Transverse Mercator Transverse_Mercator: Scale_Factor_at_Central_Meridian: 0.999600 Longitude_of_Central_Meridian: -123.000000 Latitude_of_Projection_Origin: 0.000000 False_Easting: 500000.000000 False_Northing: 0.000000 Planar_Coordinate_Information: Planar_Coordinate_Encoding_Method: coordinate pair Coordinate_Representation: Abscissa_Resolution: 0.000128 Ordinate_Resolution: 0.000128 Planar_Distance_Units: meters Geodetic_Model: Horizontal_Datum_Name: D_Clarke_1866 Ellipsoid_Name: Clarke 1866 Semi-major_Axis: 6378206.400000 Denominator_of_Flattening_Ratio: 294.978698 Entity_and_Attribute_Information: Detailed_Description: srgeology Entity_Type: Entity_Type_Label: srgeology.aat Attribute: Attribute_Label: FID Attribute_Definition: Internal feature number. 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Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Whole numbers that are automatically generated. Attribute: Attribute_Label: RPOLY# Attribute_Definition: Internal node number for the right polygon. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Whole numbers that are automatically generated. Attribute: Attribute_Label: LENGTH Attribute_Definition: Length of feature in internal units. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Positive real numbers that are automatically generated. Attribute: Attribute_Label: SRGEOLOGY# Attribute_Definition: Internal feature number. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Sequential unique whole numbers that are automatically generated. Attribute: Attribute_Label: SRGEOLOGY-ID Attribute_Definition: User-defined feature number. Attribute_Definition_Source: ESRI Attribute: Attribute_Label: LTYPE Attribute_Definition: Geologic contact description Attribute_Definition_Source: Author Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: contact, certain Enumerated_Domain_Value_Definition: Boundary between geologic units established in reconnaissance mapping by authors or compiled from other workers Enumerated_Domain: Enumerated_Domain_Value: contact, concealed Enumerated_Domain_Value_Definition: Boundary between geologic units that is concealed by a younger units Enumerated_Domain: Enumerated_Domain_Value: contact, inferred Enumerated_Domain_Value_Definition: Boundary of uncertain location between geologic units; contact exists but location inferred from indirect evidence Enumerated_Domain: Enumerated_Domain_Value: contact, gradational Enumerated_Domain_Value_Definition: Boundary between geologic units that is indefinate or gradational Enumerated_Domain: Enumerated_Domain_Value: normal fault, certain Enumerated_Domain_Value_Definition: Trace of fault established in reconnaissance mapping by authors or compiled from other workers Enumerated_Domain: Enumerated_Domain_Value: normal fault, inferred Enumerated_Domain_Value_Definition Uncertain location of fault; positional accuracy uncertain but but general location inferred from indirect evidence Enumerated_Domain: Enumerated_Domain_Value: normal fault, concealed Enumerated_Domain_Value_Definition: Trace of fault concealed by younger unit; positional accuracy uncertain Enumerated_Domain: Enumerated_Domain_Value: thrust fault, certain Enumerated_Domain_Value_Definition: Trace of fault established in reconnaissance mapping by authors or compiled from other workers Enumerated_Domain: Enumerated_Domain_Value: thrust fault, concealed Enumerated_Domain_Value_Definition: Trace of thrust fault concealed by younger unit; positional accuracy uncertain Enumerated_Domain_Value: thrust fault, inferred Enumerated_Domain_Value_Definition Uncertain location of fault; positional accuracy uncertain but but general location inferred from indirect evidence Enumerated_Domain: Enumerated_Domain_Value: map boundary, certain Enumerated_Domain_Value_Definition: map boundary of this 1:100,000 study Enumerated_Domain: Enumerated_Domain_Value: glacier boundary, certain Enumerated_Domain_Value_Definition: Boundary of glacier derived from Sauk River 1:100,000 scale topographic map Enumerated_Domain: Enumerated_Domain_Value: water boundary, certain Enumerated_Domain_Value_Definition: Boundary of open water derived from Sauk River 1:100,000 scale topographic map Entity_Type: Entity_Type_Label: srgeology.pat Attribute: Attribute_Label: FID Attribute_Definition: Internal feature number. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Sequential unique whole numbers that are automatically generated. Attribute: Attribute_Label: Shape Attribute_Definition: Feature geometry. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Coordinates defining the features. Attribute: Attribute_Label: AREA Attribute_Definition: Area of feature in internal units squared. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Positive real numbers that are automatically generated. Attribute: Attribute_Label: PERIMETER Attribute_Definition: Perimeter of feature in internal units. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Positive real numbers that are automatically generated. Attribute: Attribute_Label: SRGEOLOGY# Attribute_Definition: Internal feature number. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Sequential unique whole numbers that are automatically generated. Attribute: Attribute_Label: SRGEOLOGY-ID Attribute_Definition: User-defined feature number. Attribute_Definition_Source: ESRI Attribute: Attribute_Label: PTYPE Attribute_Definition: symbol of geologic unit Attribute_Definition_Source: Author Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Ql Enumerated_Domain_Value_Definition: NON-GLACIAL DEPOSIT: Landslide deposits (Holocene)ﾑDiamictons composed of angular clasts of bedrock and surficial deposits derived from upslope. Arrows denote downslope direction of movement. Unit includes both transported material and unstable scarp area if present Enumerated_Domain: Enumerated_Domain_Value: Qbi Enumerated_Domain_Value_Definition: NON-GLACIAL DEPOSIT: Incipient blockslides (Holocene)ﾑLarge unrotated masses of bedrock crevassed or otherwise deformed as a result of slight movement toward nearby free face. Recognized primarily from air photos. Arrow shows direction of movement Enumerated_Domain: Enumerated_Domain_Value: Qmw Enumerated_Domain_Value_Definition: NON-GLACIAL DEPOSIT: Mass-wastage deposits (Holocene and Pleistocene)ﾑColluvium, soil, or landslide debris with indistinct morphology, mapped where sufficiently continuous and thick to obscure underlying material. Unit is gradational with units Qf and Ql Enumerated_Domain: Enumerated_Domain_Value: Qt Enumerated_Domain_Value_Definition: NON-GLACIAL DEPOSIT: Talus deposits (Holocene)ﾑNon-sorted angular boulder gravel to boulder diamicton. At lower elevations gradational with unit Qf. At higher elevations includes small rock-avalanche deposits, as well as some Holocene moraines, rock glaciers, and protalus rampart deposits that lack characteristic morphology. Surfaces generally unvegetated Enumerated_Domain: Enumerated_Domain_Value: Qf Enumerated_Domain_Value_Definition: NON-GLACIAL DEPOSIT: Alluvial-fan deposits (Holocene)ﾑPoorly sorted cobble to boulder gravel, deposited either as a discrete lobe at the intersection of a steep stream with a valley floor of lower gradient or as a broad apron on steep sideslopes Enumerated_Domain: Enumerated_Domain_Value: Qb Enumerated_Domain_Value_Definition: NON-GLACIAL DEPOSIT: Bog deposits (Holocene)ﾑPeat and alluvium. Poorly drained and intermittently wet. Grades into unit Qyal Enumerated_Domain: Enumerated_Domain_Value: Qyal Enumerated_Domain_Value_Definition: NON-GLACIAL DEPOSIT: Younger alluvium (Holocene)ﾑModerately sorted deposits of cobble gravel to pebbly sand along rivers and streams. Generally unvegetated surfaces; gradational with units Qf and Qb Enumerated_Domain: Enumerated_Domain_Value: Qoal Enumerated_Domain_Value_Definition: NON-GLACIAL DEPOSIT: Older alluvium (Holocene and Pleistocene)ﾑDeposits similar to unit Qyal, but standing above modern floodplain level and generally separated from it by a distinct topographic scarp. Age of deposits presumed younger than that of unit Qvr, but relations are ambiguous in some localities Enumerated_Domain: Enumerated_Domain_Value: Qa Enumerated_Domain_Value_Definition: NON-GLACIAL DEPOSIT: Alluvium and mass-wastage deposits, undivided (Holocene and Pleistocene)ﾑUndivided deposits composed of units Qf, Qyal, Qmw, Qvt, and Qvr, intermixed on the sides and floors of upland stream valleys. Similar to unit Qag in heterogeneity but occurring where deposits of alpine glaciers have been later obscured or are absent Enumerated_Domain: Enumerated_Domain_Value: Qag Enumerated_Domain_Value_Definition: GLACIAL DEPOSITS: Alpine glacial deposits (Holocene and Pleistocene)ﾑDeposits ranging from boulder till in uplands and upvalley t o gravel or sand outwash on broad valley floors. On valley sides and uplands, includes areas veneered with drift, but also includes bedrock, alluvial fans, colluvium, or talus deposits. On valley floors, also includes small fans, bogs, and modern stream alluvium. Areas of thin, sparse drift not distinguished from bedrock. Includes indistinct moraines near outlets of Heather Lake and Lake Twentytwo. Miller (1969) has described neoglacial moraines below South Cascade and Le Conte Glaciers Enumerated_Domain: Enumerated_Domain_Value: Qvr Enumerated_Domain_Value_Definition: GLACIAL DEPOSITS: Deposits of the Fraser glaciation of Armstrong and others (1965): Vashon Drift (Pleistocene): Recessional outwash depositsﾑStratified sand and gravel, moderately sorted to well-sorted, and well-bedded silty sand to silty clay. This deposit formed predominantly in outwash plain and valley train environments in lowland areas. Enumerated_Domain: Enumerated_Domain_Value: Qvrs Enumerated_Domain_Value_Definition: GLACIAL DEPOSITS: Deposits of the Fraser glaciation of Armstrong and others (1965): Vashon Drift (Pleistocene): Recessional outwash deposits: Stillaguamish Sand Member Enumerated_Domain: Enumerated_Domain_Value: Qvi Enumerated_Domain_Value_Definition: GLACIAL DEPOSITS: Deposits of the Fraser glaciation of Armstrong and others (1965): Vashon Drift (Pleistocene): Ice-contact depositsﾑSimilar in texture to unit Qvr, but containing collapse features, abrupt grain-size changes, or till lenses that indicate deposition near stagnant or active ice Enumerated_Domain: Enumerated_Domain_Value: Qvt Enumerated_Domain_Value_Definition: GLACIAL DEPOSITS: Deposits of the Fraser glaciation of Armstrong and others (1965): Vashon Drift (Pleistocene): TillﾑMainly compact diamicton with subangular to rounded clasts, glacially transported and deposited. In ice-marginal areas or where covered by a thin layer of recessional outwash, contact with units Qvi or Qvr is gradational. Mapped areas also include deposits of units Qf, Qmw, and Qyal that are poorly exposed or too small to show at this map scale Enumerated_Domain: Enumerated_Domain_Value: Qva Enumerated_Domain_Value_Definition: GLACIAL DEPOSITS: Deposits of the Fraser glaciation of Armstrong and others (1965): Vashon Drift (Pleistocene): Advance outwash depositsﾑWell-bedded gravelly sand, fine-grained sand, and bedded silt, generally firm and unoxidized; deposited by proglacial streams and in proglacial lakes Enumerated_Domain: Enumerated_Domain_Value: Qtb Enumerated_Domain_Value_Definition: EARLY GLACIAL AND NON-GLACIAL DEPOSITS: Transitional beds (Pleistocene)ﾑLaminated clayey silt to clay that either pre-date or were formed during the early part of the Vashon stade; rare dropstones present Enumerated_Domain: Enumerated_Domain_Value: Qpf Enumerated_Domain_Value_Definition: EARLY GLACIAL AND NON-GLACIAL DEPOSITS: Non-glacial and glacial sedimentary deposits of pre-Fraser glaciation-age (Pleistocene)ﾑModerately to deeply weathered, moderately sorted sand and gravel. Weathering rinds 1-3 mm thick on fine-grained volcanic clasts. Exposed only in the western part of quadrangle along north and south boundaries Enumerated_Domain: Enumerated_Domain_Value: Qglh Enumerated_Domain_Value_Definition: ROCKS AND DEPOSITS OF THE CASCADE MAGMATIC ARC: Rocks of Glacier Peak volcano and associated volcanic rocks and deposits (Holocene and Pleistocene): Laharic deposits (Holocene and Pleistocene)ﾑBoulder diamicton to well-sorted sand and gravel with characteristic clasts of pumice and volcanic rocks from Glacier Peak; found along Suiattle, White Chuck, Sauk, and North Fork of the Stillaguamish Rivers. Includes deposits of unit Qyal where alluvium is too narrow to easily distinguish at this map scale Enumerated_Domain: Enumerated_Domain_Value:Qgp Enumerated_Domain_Value_Definition: ROCKS AND DEPOSITS OF THE CASCADE MAGMATIC ARC: Rocks of Glacier Peak volcano and associated volcanic rocks and deposits (Holocene and Pleistocene): Pumice deposits (Holocene)ﾑMostly unconsolidated dacitic ash and pumice clast deposits as thick as 3 m Enumerated_Domain: Enumerated_Domain_Value: Qgwf Enumerated_Domain_Value_Definition: ROCKS AND DEPOSITS OF THE CASCADE MAGMATIC ARC: Rocks of Glacier Peak volcano and associated volcanic rocks and deposits (Holocene and Pleistocene): Deposits of the White Chuck fill (Holocene and Pleistocene)ﾑWell-bedded assemblage of lahars, pyroclastic flow deposits, alluvium, and reworked ash and silt. Parts of unit grade into unit Qglh downvalley. May also include some younger deposits. Enumerated_Domain: Enumerated_Domain_Value: Qgwt Enumerated_Domain_Value_Definition: ROCKS AND DEPOSITS OF THE CASCADE MAGMATIC ARC: Rocks of Glacier Peak volcano and associated volcanic rocks and deposits (Holocene and Pleistocene): Deposits of the White Chuck fill (Holocene and Pleistocene)ﾑ An indurated, cliff-forming dacitic vitric tuff crops out in upper part of the White Chuck fill. The tuff is depicted on the map as forming a cap on the fill, but in reality, the tuff is overlain by at least one lahar (Beget, 1981, p. 59) Enumerated_Domain: Enumerated_Domain_Value: Qgsf Enumerated_Domain_Value_Definition: ROCKS AND DEPOSITS OF THE CASCADE MAGMATIC ARC: Rocks of Glacier Peak volcano and associated volcanic rocks and deposits (Holocene and Pleistocene): Deposits of the Suiattle fill (Holocene)ﾑWell-bedded assemblage of lahars, pyroclastic flows, air-fall ash, alluvium, and rare lava flows. Deposit grades downvalley into unit Qglh Enumerated_Domain: Enumerated_Domain_Value: Qgd Enumerated_Domain_Value_Definition: ROCKS AND DEPOSITS OF THE CASCADE MAGMATIC ARC: Rocks of Glacier Peak volcano and associated volcanic rocks and deposits (Holocene and Pleistocene): Dacite (Holocene and (or) Pleistocene)ﾑMostly clinopyroxene-hypersthene dacite. Forms flows and volcanic rubble on Glacier Peak volcano Enumerated_Domain: Enumerated_Domain_Value: Qgdp Enumerated_Domain_Value_Definition: ROCKS AND DEPOSITS OF THE CASCADE MAGMATIC ARC: Rocks of Glacier Peak volcano and associated volcanic rocks and deposits (Holocene and Pleistocene): Dacite of Disappointment Peak (Holocene and (or) Pleistocene)ﾑOxyhornblende-hypersthene dacite forming massive, partly eroded dom Enumerated_Domain: Enumerated_Domain_Value: Qcc Enumerated_Domain_Value_Definition: ROCKS AND DEPOSITS OF THE CASCADE MAGMATIC ARC: Rocks of Glacier Peak volcano and associated volcanic rocks and deposits (Holocene and Pleistocene): Cinder cones (Holocene)ﾑWhite Chuck Cinder Cone consisting of basalt lapilli and minor bombs with a few interbedded olivine basalt flows. Cinder cone remnant just north of Indian Pass (just south of Sauk River quadrangle) is mostly composed of well-stratified tuff and breccia Enumerated_Domain: Enumerated_Domain_Value: Qaf Enumerated_Domain_Value_Definition: ROCKS AND DEPOSITS OF THE CASCADE MAGMATIC ARC: Rocks of Glacier Peak volcano and associated volcanic rocks and deposits (Holocene and Pleistocene): Andesite flow (Holocene and (or) Pleistocene)ﾑEroded remnant of columnar-jointed olivine andesite flow at mouth of Lightning Creek Enumerated_Domain: Enumerated_Domain_Value: Tgrv Enumerated_Domain_Value_Definition: ROCKS AND DEPOSITS OF THE CASCADE MAGMATIC ARC: Volcanic rocks of Gamma Ridge (Pliocene): Volcanic rocksﾑAltered tuff, volcanic breccia, volcanic sandstone, welded tuff, and minor flows of basalt. Variegated red, brown, green, and white; bedding obscure; altered to carbonate minerals, sericite, clays, and chlorite; siliceous kaolinite common near Gamma Peak; glassy rocks commonly spherulitic; common veins of zeolites, carbonate minerals, and quartz. Before alteration, composition ranged from rhyolite to basalt Enumerated_Domain: Enumerated_Domain_Value: Tgrc Enumerated_Domain_Value_Definition: ROCKS AND DEPOSITS OF THE CASCADE MAGMATIC ARC: Volcanic rocks of Gamma Ridge (Pliocene): ConglomerateﾑWhite to dirty-gray tuffaceous conglomerate. Poorly bedded, composed of cobbles of granitoid rocks, quartzite, schist, and light-colored holocrystalline volcanic rocks in a fine-grained matrix of volcanic subquartzose sandstone that is much altered to greenish-yellow chlorite(?). Locally composed entirely of andesite cobbles Enumerated_Domain: Enumerated_Domain_Value: Tgrf Enumerated_Domain_Value_Definition: ROCKS AND DEPOSITS OF THE CASCADE MAGMATIC ARC: Volcanic rocks of Gamma Ridge (Pliocene): Altered andesite and dacite flowsﾑRed to black andesite and dacite, plagioclase-phyric, trachytic; much altered to calcite, chlorite, and zeolites Enumerated_Domain: Enumerated_Domain_Value: Tcgg Enumerated_Domain_Value_Definition: ROCKS AND DEPOSITS OF THE CASCADE MAGMATIC ARC: Intrusive rocks of the Cascade Pass family: Cool Glacier stock (Pliocene): GranodioriteﾑPyroxene-biotite-hornblende granodiorite and quartz monzodiorite. Medium grained, hypidiomorphic granular Enumerated_Domain: Enumerated_Domain_Value: Tcgb Enumerated_Domain_Value_Definition: ROCKS AND DEPOSITS OF THE CASCADE MAGMATIC ARC: Intrusive rocks of the Cascade Pass family: Cool Glacier stock (Pliocene): BrecciaﾑClasts derived from Tenpeak pluton in a hydrothermally altered matrix of highly comminuted tonalite and altered volcanic material and some glass Enumerated_Domain: Enumerated_Domain_Value: Tdp Enumerated_Domain_Value_Definition: ROCKS AND DEPOSITS OF THE CASCADE MAGMATIC ARC: Intrusive rocks of the Cascade Pass family: Dacite plugs and dikes (Pliocene)ﾑGray, porphyritic biotite-hornblende-hypersthene dacite with locally resorbed quartz phenocrysts. Locally well-developed columnar jointing. Includes dacite breccia northwest of Glacier Peak. Locally includes andesite Enumerated_Domain: Enumerated_Domain_Value: Tmbt Enumerated_Domain_Value_Definition: ROCKS AND DEPOSITS OF THE CASCADE MAGMATIC ARC: Intrusive rocks of the Cascade Pass family: Mount Buckindy pluton (Miocene): Tonalite and granodioriteﾑMostly porphyritic biotite-hornblende tonalite to hornblende tonalite porphyry. Rocks are quartz-phyric with hypidiomorphic granular groundmass, but heterogeneous in grain size and texture Enumerated_Domain: Enumerated_Domain_Value: Tmbb Enumerated_Domain_Value_Definition: ROCKS AND DEPOSITS OF THE CASCADE MAGMATIC ARC: Intrusive rocks of the Cascade Pass family: Mount Buckindy pluton (Miocene): BrecciaﾑClasts of tonalite in a vuggy quartz and iron oxide (magnetite?) matrix Enumerated_Domain: Enumerated_Domain_Value: Tdt Enumerated_Domain_Value_Definition: ROCKS AND DEPOSITS OF THE CASCADE MAGMATIC ARC: Intrusive rocks of the Cascade Pass family: Cascade Pass dike (Miocene): TonaliteﾑMedium-grained hornblende-biotite tonalite, hypidiomorphic granular with small glomeroporphyrocrysts of mafic minerals. Massive and coarsely jointed, with local areas of disseminated sulfide minerals. The dike has fine-grained, porphyritic, chilled margins; contact lit-par-lit complexes are common, and alteration is pervasive locally Enumerated_Domain: Enumerated_Domain_Value:Tdbx Enumerated_Domain_Value_Definition: ROCKS AND DEPOSITS OF THE CASCADE MAGMATIC ARC: Intrusive rocks of the Cascade Pass family: Cascade Pass dike (Miocene): BrecciaﾑRotated fragments of altered hornblende schist with minor quartz and calcite or aplitic matrix grading downward into swarms of schist inclusions in a miarolitic tonalite matrix Enumerated_Domain: Enumerated_Domain_Value: Tcpl Enumerated_Domain_Value_Definition: ROCKS AND DEPOSITS OF THE CASCADE MAGMATIC ARC: Intrusive rocks of the Cascade Pass family: Cloudy Pass batholith and associated rocks (Miocene): Light-colored granite and granodioriteﾑHornblende-biotite granite and granodiorite, white to pink, medium-grained subhedral plagioclase in a finer grained matrix of xenomorphic granular to granophyric quartz and orthoclase; color index (CI)=5-15, massive, jointed, inclusions rare. Sharp contact with country rocks on west, grades into unit Tcpd on east Enumerated_Domain: Enumerated_Domain_Value: Tcpd Enumerated_Domain_Value_Definition: ROCKS AND DEPOSITS OF THE CASCADE MAGMATIC ARC: Intrusive rocks of the Cascade Pass family: Cloudy Pass batholith and associated rocks (Miocene): Dark-colored granodiorite, tonalite, gabbro, and quartz gabbroﾑ Light- to dark-gray, medium-grained hornblende-biotite granodiorite, gabbro, tonalite, and quartz gabbro, hypidiomorphic granular. CI=10-30. Massive, well-jointed, inclusions rare; locally altered and cataclastic, grades into unit Tcpl and in smaller bodies commonly contains pyroxene and locally abundant mafic inclusions. Varied in texture and composition, locally porphyritic. South of Lake Byrne forms a complex of dikes, sills, and irregular small masses. At South Cascade Glacier, quartz with necklace inclusions suggests early-formed quartz phenocrysts Enumerated_Domain: Enumerated_Domain_Value:Tcpu Enumerated_Domain_Value_Definition: ROCKS AND DEPOSITS OF THE CASCADE MAGMATIC ARC: Intrusive rocks of the Cascade Pass family: Cloudy Pass batholith and associated rocks (Miocene): Granodiorite, tonalite, and gabbro, undivided Enumerated_Domain: Enumerated_Domain_Value: Tcpb Enumerated_Domain_Value_Definition: ROCKS AND DEPOSITS OF THE CASCADE MAGMATIC ARC: Intrusive rocks of the Cascade Pass family: Cloudy Pass batholith and associated rocks (Miocene): Intrusive brecciaﾑChips and large blocks of schist, gneiss, and aphanite in a matrix of dacite which is commonly highly cataclastic; dark aphanite fragments and dacitic matrix commonly trachytic; locally recrystallized by thermal metamorphism Enumerated_Domain: Enumerated_Domain_Value: Tcpc Enumerated_Domain_Value_Definition: ROCKS AND DEPOSITS OF THE CASCADE MAGMATIC ARC: Intrusive rocks of the Cascade Pass family: Cloudy Pass batholith and associated rocks (Miocene): Clustered light-colored dikes and irregular intrusive bodiesﾑWhite, variably fine grained to coarse grained xenomorphic or hypidiomorphic granular tonalite to granite alaskite in densely clustered dikes, sills, and irregular bodies, generally making up 80 percent or more of bedrock. Locally weakly to strongly foliated. Contacts of individual bodies are sharp. Contact of mapped concentration is gradational. Rocks rich in K-feldspar appear to be related to the batholith, but many light-colored rocks may be older associates of the metamorphic country rock Enumerated_Domain: Enumerated_Domain_Value: Tdm Enumerated_Domain_Value_Definition: ROCKS AND DEPOSITS OF THE CASCADE MAGMATIC ARC: Intrusive rocks of the Cascade Pass family: Downey Mountain stock (Miocene)ﾑHornblende-biotite tonalite, locally granodiorite. Similar to unit Tcpd Enumerated_Domain: Enumerated_Domain_Value: Tgm Enumerated_Domain_Value_Definition: ROCKS AND DEPOSITS OF THE CASCADE MAGMATIC ARC: Intrusive rocks of the Snoqualmie family: Grotto batholith (Oligocene): Monte Cristo stockﾑHornblende-biotite granodiorite and tonalite. Locally contains augite and hypersthene. Commonly somewhat altered to chlorite, epidote, and sphene Enumerated_Domain: Enumerated_Domain_Value: Tgd Enumerated_Domain_Value_Definition: ROCKS AND DEPOSITS OF THE CASCADE MAGMATIC ARC: Intrusive rocks of the Snoqualmie family: Grotto batholith (Oligocene): Dead Duck plutonﾑHornblende-biotite tonalite and granodiorite, with minor augite and hypersthene Enumerated_Domain: Enumerated_Domain_Value: Tst Enumerated_Domain_Value_Definition: ROCKS AND DEPOSITS OF THE CASCADE MAGMATIC ARC: Intrusive rocks of the Index family: Squire Creek stock and related intrusive rocks (Oligocene): TonaliteﾑPredominantly uniform hornblende-biotite tonalite and granodiorite, medium-grained and hypidiomorphic granular. Locally rich in small hornblende diorite inclusions. CI=12-18 as reported in Vance (1957a, p. 241-274). Locally in interior, pluton is fine-grained and with lower CI Enumerated_Domain: Enumerated_Domain_Value: Tsbt Enumerated_Domain_Value_Definition: ROCKS AND DEPOSITS OF THE CASCADE MAGMATIC ARC: Intrusive rocks of the Index family: Squire Creek stock and related intrusive rocks (Oligocene): Biotite tonaliteﾑOn Vesper Peak mostly medium-grained hypidiomorphic inequigranular; rarely hornblende-biotite tonalite with rare hypersthene. CI=9-28, mostly about 12･20 (Baum, 1968, p. 20) Enumerated_Domain: Enumerated_Domain_Value: Tsh Enumerated_Domain_Value_Definition: ROCKS AND DEPOSITS OF THE CASCADE MAGMATIC ARC: Intrusive rocks of the Index family: Squire Creek stock and related intrusive rocks (Oligocene): Hornblende quartz dioriteﾑAt Granite Lake the rocks are a porphyritic hornblende-clinopyroxene quartz diorite with euhedral, highly corroded, pale-brown hornblende phenocrysts. Dikes of a similar but more porphyritic rock-type are common in the Mount Higgins area Enumerated_Domain: Enumerated_Domain_Value: Tsst Enumerated_Domain_Value_Definition: ROCKS AND DEPOSITS OF THE CASCADE MAGMATIC ARC: Intrusive rocks of the Index family: Squire Creek stock and related intrusive rocks (Oligocene): Tonalite of the Shake Creek stockﾑBiotite-hornblende tonalite, fine-grained, highly altered Enumerated_Domain: Enumerated_Domain_Value: Tsrd Enumerated_Domain_Value_Definition: ROCKS AND DEPOSITS OF THE CASCADE MAGMATIC ARC: Intrusive rocks of the Index family: Sauk ring dike (Oligocene and (or) middle Eocene)ﾑGray dacite and andesite porphyry with abundant plagioclase and rare quartz phenocrysts; highly altered to epidote, chlorite, sericite, albite, and carbonate minerals. A t northwest base of Sheep Mountain, rocks are a mixture of holocrystalline hornblende tonalite, dacite, and porphyry, as well as gradational types in between Enumerated_Domain: Enumerated_Domain_Value: Trl Enumerated_Domain_Value_Definition: SEDIMENTARY AND IGNEOUS ROCK: Breccia of Round Lake (Miocene)ﾑPredominantly andesite to dacite breccia forming massive cliffs, locally weakly bedded. Rocks are plagioclase phyric, but phenocrysts are highly altered and mafic minerals are replaced by chlorite. Includes some probable hypabyssal holocrystalline pyroxene andesite porphyry Enumerated_Domain: Enumerated_Domain_Value:Tus Enumerated_Domain_Value_Definition: SEDIMENTARY AND IGNEOUS ROCK Unnamed sandstone (Oligocene)ﾑModerately weathered to deeply weathered, sandy pebble conglomerate to very fine grained sandstone. Coarse beds contain a high percentage of quartzose pebbles; finer beds contain considerable mica and lignite. Deeply weathered exposures usually can be distinguished from old glacial outwash by manganese staining on joint planes, quartzose or pebble-rich lithology, and presence of organic matter Enumerated_Domain: Enumerated_Domain_Value: Tbv Enumerated_Domain_Value_Definition: SEDIMENTARY AND IGNEOUS ROCK: Barlow Pass Volcanics of Vance (1957a, b) (late and middle Eocene): Volcanic rocksﾑBasaltic andesite, basalt and, rhyolite in flows, breccia, and tuff interbedded with tuffaceous to feldspathic sandstone, conglomerate, and minor argillite. Basalt in the upper part of the section forms dark brown columnar flows. Basaltic andesite occurring lower in section is generally dark-green to gray, aphyric, massive, and dense. Rhyolite occurs as thick flows, typically weathering light-green t o white with flow laminations; commonly spherulitic. Volcanic rocks are mostly highly altered to a dense mat of chlorite, epidote, calcite, and sericite; porphyritic and trachytoid textures are relict. Bedding in volcanic rocks is obscure except in some water-laid tuffs Enumerated_Domain: Enumerated_Domain_Value: Tbg Enumerated_Domain_Value_Definition: SEDIMENTARY AND IGNEOUS ROCK: Barlow Pass Volcanics of Vance (1957a, b) (late and middle Eocene): GabbroﾑMedium-grained, ophitic with plagioclase and clinopyroxene. Intrusive into volcanic rocks (Tbv), but affinity uncertain Enumerated_Domain: Enumerated_Domain_Value: Tbb Enumerated_Domain_Value_Definition: SEDIMENTARY AND IGNEOUS ROCK: Barlow Pass Volcanics of Vance (1957a, b) (late and middle Eocene): BasaltﾑClinopyroxene･plagioclase microphyric basalt; in part, amygdaloidal. Cliff-forming columnar flows up to several tens of meters thick Enumerated_Domain: Enumerated_Domain_Value: Tbr Enumerated_Domain_Value_Definition: SEDIMENTARY AND IGNEOUS ROCK: Barlow Pass Volcanics of Vance (1957a, b) (late and middle Eocene): Rhyolite flows and rhyolite ash-flow tuffﾑCommonly dark colored, green or black, weathering to light green, gray, white, or orange with sparse microphenocrysts of plagioclase and quartz. Commonly laminated and spherulitic, devitrified or highly altered to montmorillonoids Enumerated_Domain: Enumerated_Domain_Value: Tbs Enumerated_Domain_Value_Definition: SEDIMENTARY AND IGNEOUS ROCK: Barlow Pass Volcanics of Vance (1957a, b) (late and middle Eocene): SandstoneﾑMostly feldspathic subquartzose sandstone and pebble conglomerate with minor interbeds of argillite and siltstone, rarer tuffaceous sandstone, and tuff. Detrital mica and fossil leaves common. Well-bedded. In the area northwest of Darrington, bentonite interbeds are present (Kinder-Cruver, 1981, p. 29), and many sandstone beds are composed of quartz framework grains totally supported in a matrix rich in montmorillonoids probably derived from volcanic glass. Within 1 to 2 km of the Squire Creek stock and related plutons, sandstone and argillite are hornfelsic. Within the Darrington-Devils Mountain Fault Zone, conglomerate clasts are highly stretched Enumerated_Domain: Enumerated_Domain_Value: Tbsv Enumerated_Domain_Value_Definition: SEDIMENTARY AND IGNEOUS ROCK: Barlow Pass Volcanics of Vance (1957a, b) (late and middle Eocene): Sandstone and volcanic rocksﾑSandstone with conspicuous interbeds of basalt and rhyolite Enumerated_Domain: Enumerated_Domain_Value: Tgf Enumerated_Domain_Value_Definition: SEDIMENTARY AND IGNEOUS ROCK: Granite Falls stock and associated plutons (middle Eocene)ﾑBiotite hornblende granodiorite, mostly fine grained hypidiomorphic granular, slightly porphyritic. Locally contains hypersthene and small amounts of elbaite (tourmaline). Commonly highly altered. Country rock strongly thermally metamorphosed Enumerated_Domain: Enumerated_Domain_Value: Tpg Enumerated_Domain_Value_Definition: SEDIMENTARY AND IGNEOUS ROCK: Mount Pilchuck stock (middle Eocene): Granite and granodioriteﾑMostly fine grained, slightly porphyritic, hypidiomorphic granular biotite granite with resorbed quartz phenocrysts. CI=4-8, locally as much as 40 percent K-feldspar, mostly perthite (Wiebe, 1963, p. 21). Wiebe (1963, p. 24-31) describes accessory cordierite and one occurrence of garnet. Zircon and tourmaline (elbaite) are also common accessories. Rock is massive, has chilled margins, and has thermally metamorphosed the country rock Enumerated_Domain: Enumerated_Domain_Value: Thl Enumerated_Domain_Value_Definition: SEDIMENTARY AND IGNEOUS ROCK: Rhyolite of Hanson Lake (middle Eocene)ﾑDark-colored, glassy to devitrified biotite rhyolite ash-flow tuff. Commonly perlitic, contains sanidine, plagioclase, quartz, and garnet phenocrysts. Poorly exposed near Hanson Lake and to the west where the unit includes quartz- and clinopyroxene･bearing mafic tuff. Northwest of Bosworth Lake, mafic tuff and breccia are highly altered t o epidote and smectites Enumerated_Domain: Enumerated_Domain_Value: Tfs Enumerated_Domain_Value_Definition: SEDIMENTARY AND IGNEOUS ROCK: Feldspathic sandstone and conglomerate (middle Eocene)ﾑDark-gray to green, locally red to purple, medium- to coarse-grained feldspathic sandstone, pebble to boulder conglomerate, and minor thin-bedded black argillite. Most coarse clasts are graywacke and greenstone Enumerated_Domain: Enumerated_Domain_Value: Tss Enumerated_Domain_Value_Definition: SEDIMENTARY AND IGNEOUS ROCK: Sandstone associated with the Straight Creek Fault (middle and (or) early Eocene)ﾑFeldspathic sandstone and pebble conglomerate. Mostly highly sheared and locally altered Enumerated_Domain: Enumerated_Domain_Value: TKhm Enumerated_Domain_Value_Definition: ROCKS WEST OF THE STRAIGHT CREEK FAULT: Rocks in the Darrington-Devils Mountain Fault Zone (DDMFZ): Helena-Haystack m四ange (middle Eocene to Late Cretaceous): Peridotite and serpentinite matrixﾑMetamorphic peridotite and rare metamorphic dunite are orange- and black-weathering resistant rocks occurring mostly as steeply dipping tectonic lenses and sheets in Tertiary sandstone and as isolated blocks in serpentinite. Some relict pyroxene in serpentinite above Swede Heaven suggests original cumulus textures. Serpentinite is generally flaky, gray to green in rare outcrops. On Helena Ridge, serpentinite is lizardite and chrysotile (Vance and Dungan, l977, p. 1498). In the Iron Mountain-Gee Point area, Brown and others (1982, p. 1089) describe serpentinite composed of antigorite, commonly with well-defined foliation, and relict aluminous chromite, rimmed by Fe-chromite suggesting an alpine peridotite protolith Enumerated_Domain: Enumerated_Domain_Value: TKhg Enumerated_Domain_Value_Definition: ROCKS WEST OF THE STRAIGHT CREEK FAULT: Rocks in the Darrington-Devils Mountain Fault Zone (DDMFZ): Helena-Haystack m四ange (middle Eocene to Late Cretaceous): Greenstone, foliated greenstone, and greenschistﾑGreenstone including basalt with relict clinopyroxene and plagioclase to well-recrystallized actinolitic greenstone, and greenschist, commonly with pumpellyite, prehnite, stilpnomelane, and locally with aragonite in veins. Cruver (1983, p. 23) reports lawsonite in metagraywacke associated with greenstone of his Haystack Mountain unit on strike to the northwest. Outcrops are commonly massive, but on Big and Little Deer Peaks, probable bedding is revealed by broad color bands and contrasting joint patterns when viewed from afar. See Cruver (1983) and Reller (1986) for detailed petrography and chemistry. Includes minor schistose dacite metaporphyry, graywacke, and argillite Enumerated_Domain: Enumerated_Domain_Value: TKhd Enumerated_Domain_Value_Definition: ROCKS WEST OF THE STRAIGHT CREEK FAULT: Rocks in the Darrington-Devils Mountain Fault Zone (DDMFZ): Helena-Haystack m四ange (middle Eocene to Late Cretaceous): Diabase and gabbroﾑUralitic metadiabase and metagabbro, rarely with relict brown hornblende and saussuritic plagioclase, and very rare relict clinopyroxene. Partially to completely altered to actinolite and pumpellyite with pseudomorphous ophitic or subophitic textures. Commonly cut by mylonitic to cataclastic microshears. Commonly weathers out of serpentinite matrix as steepsided hillocks Enumerated_Domain: Enumerated_Domain_Value:TKhs Enumerated_Domain_Value_Definition: ROCKS WEST OF THE STRAIGHT CREEK FAULT: Rocks in the Darrington-Devils Mountain Fault Zone (DDMFZ): Helena-Haystack m四ange (middle Eocene to Late Cretaceous): Sedimentary rocksﾑChert, graywacke, phyllitic argillite, and semischist Enumerated_Domain: Enumerated_Domain_Value: TKhf Enumerated_Domain_Value_Definition: ROCKS WEST OF THE STRAIGHT CREEK FAULT: Rocks in the Darrington-Devils Mountain Fault Zone (DDMFZ): Helena-Haystack m四ange (middle Eocene to Late Cretaceous): Foliated metavolcanic rocksﾑSilicic metaporphyry and micaceous quartz-feldspar schist, commonly with relict plagioclase phenoclasts. Foliated light-colored greenstone and greenstone. On Helena Ridge, includes considerable foliated greenstone, some with relict pillows. Northwest of Darrington, includes considerable metabasalt with relict plagioclase and clinopyroxene in an altered felty or trachytic matrix Enumerated_Domain: Enumerated_Domain_Value: TKha Enumerated_Domain_Value_Definition: ROCKS WEST OF THE STRAIGHT CREEK FAULT: Rocks in the Darrington-Devils Mountain Fault Zone (DDMFZ): Helena-Haystack m四ange (middle Eocene to Late Cretaceous): AmphiboliteﾑFine-grained amphibolite with well-crystallized green hornblende and plagioclase, partially altered to chlorite, epidote, and pumpellyite(?) Enumerated_Domain: Enumerated_Domain_Value: TKht Enumerated_Domain_Value_Definition: ROCKS WEST OF THE STRAIGHT CREEK FAULT: Rocks in the Darrington-Devils Mountain Fault Zone (DDMFZ): Helena-Haystack m四ange (middle Eocene to Late Cretaceous): TonaliteﾑMedium-grained hypidiomorphic hornblende tonalite altered to chlorite, prehnite, epidote, and pumpellyite(?). Rocks are locally gneissic and cataclastic, interlayered with amphibolite (TKha) at north contact of tonalite Enumerated_Domain: Enumerated_Domain_Value: bmg Enumerated_Domain_Value_Definition: ROCKS WEST OF THE STRAIGHT CREEK FAULT: Rocks southwest of the Darrington-Devils Mountain Fault Zone: Bald Mountain pluton (age uncertain): Granodiorite and graniteﾑMedium-to coarse-grained hypidiomorphic biotite granodiorite and granite, in part gneissic near margins. Locally with coarse(1-2 cm) crystals of K-feldspar, accessory cordierite, mostly altered to pinite, and rare garnet. Rock is locally cataclastic. Clinopyroxene rimmed with hornblende; intergranular graphic intergrowths of quartz and K-feldspar Enumerated_Domain: Enumerated_Domain_Value: bms Enumerated_Domain_Value_Definition: ROCKS WEST OF THE STRAIGHT CREEK FAULT: Rocks southwest of the Darrington-Devils Mountain Fault Zone: Bald Mountain pluton (age uncertain): Sill complexﾑMultiple sills of granodiorite in hornfelsic argillite and graywacke. Sills, ranging from a few meters to hundreds of meters thick, makes up from 10 to 90 percent of this rock unit Enumerated_Domain: Enumerated_Domain_Value: TKws Enumerated_Domain_Value_Definition: ROCKS WEST OF THE STRAIGHT CREEK FAULT: Rocks southwest of the Darrington-Devils Mountain Fault Zone: Rocks of the western melange belt (middle Eocene to Late Cretaceous): Semischist, slate, and phylliteﾑMostly pervasively foliated gray to black lithofeldspathic and volcanolithic subquartzose sandstone and semischist. Locally abundant fine- to medium-cobble conglomerate. Commonly interbedded with argillite or phyllite. Locally well developed rhythmite. Where foliation is less well developed, sedimentary features, including graded beds and load casts, are locally well preserved. Metamorphic minerals, which locally replace matrix and framework grains and also occur in veins, are carbonate minerals, prehnite, pumpellyite, chlorite, and sericite. Unit includes rare greenstone derived from mafic volcanic breccia, tuff, and flows. Also includes locally abundant chert Enumerated_Domain: Enumerated_Domain_Value: TKwph Enumerated_Domain_Value_Definition: ROCKS WEST OF THE STRAIGHT CREEK FAULT: Rocks southwest of the Darrington-Devils Mountain Fault Zone: Rocks of the western melange belt (middle Eocene to Late Cretaceous): PhylliteﾑGray, brown to black phyllite, less abundant semischist, locally abundant chert and rare greenstone. Includes subordinate thin beds of recrystallized sandstone and semischist and rare stretched-pebble conglomerate. Locally with well-developed pencil structures and rarer crinkle lineation . Metamorphic minerals are sericite, carbonate minerals, chlorite, prehnite, and pumpellyite(?). Metasandstone commonly forms small boudins as long as a few meters Enumerated_Domain: Enumerated_Domain_Value:TKwv Enumerated_Domain_Value_Definition: ROCKS WEST OF THE STRAIGHT CREEK FAULT: Rocks southwest of the Darrington-Devils Mountain Fault Zone: Rocks of the western melange belt (middle Eocene to Late Cretaceous): Volcanic rocksﾑGreenstone and sheared greenstone including diabase and gabbro. Poorly exposed south of the Pilchuck River Enumerated_Domain: Enumerated_Domain_Value: TKwg Enumerated_Domain_Value_Definition: ROCKS WEST OF THE STRAIGHT CREEK FAULT: Rocks southwest of the Darrington-Devils Mountain Fault Zone: Rocks of the western melange belt (middle Eocene to Late Cretaceous): Gabbro and dioriteﾑMassive to foliated, fine- to medium-grained metagabbro and metadiorite. Outcrops sheared on all scales. In massive rocks, euhedral, mottled, locally crushed plagioclase, integranular to euhedral uralitized clinopyroxene and opaque minerals are common. Metamorphic minerals are albite(?), uralite, chlorite, sphene, and carbonate minerals Enumerated_Domain: Enumerated_Domain_Value: TKwu Enumerated_Domain_Value_Definition: ROCKS WEST OF THE STRAIGHT CREEK FAULT: Rocks southwest of the Darrington-Devils Mountain Fault Zone: Rocks of the western melange belt (middle Eocene to Late Cretaceous): Ultramafic rocksﾑSerpentinized peridotite and dunite. Nearby Tertiary plutons have recrystallized ultramafic rocks to higher grade assemblages, locally with enstatite and talc Enumerated_Domain: Enumerated_Domain_Value: TKt Enumerated_Domain_Value_Definition: ROCKS WEST OF THE STRAIGHT CREEK FAULT: Rocks southwest of the Darrington-Devils Mountain Fault Zone: Trafton terrane of Whetten and others (1988) (middle Eocene to Late Cretaceous): Predominantly greenstone and banded chert with subordinate graywacke and argillite. Commonly highly sheared and mixed on all scales. Greenstone has relict plagioclase and clinopyroxene, but is now mostly chlorite, carbonate minerals, and brownish pumpellyite(?); some rocks with veins of green pumpellyite. Chert is red and black, locally highly recrystallized. Minor diabase. Argillite locally phyllitic Enumerated_Domain: Enumerated_Domain_Value: TKtg Enumerated_Domain_Value_Definition: ROCKS WEST OF THE STRAIGHT CREEK FAULT: Rocks southwest of the Darrington-Devils Mountain Fault Zone: Trafton terrane of Whetten and others (1988) (middle Eocene to Late Cretaceous): MetagranodioriteﾑMedium･grained, hypidiomorphic hornblende-biotite metagranodiorite partially recrystallized to albite, chlorite, prehnite, and pumpellyite Enumerated_Domain: Enumerated_Domain_Value: TKev Enumerated_Domain_Value_Definition: ROCKS WEST OF THE STRAIGHT CREEK FAULT: Rocks southwest of the Darrington-Devils Mountain Fault Zone: Rocks of the eastern melange belt (middle Eocene to Late Cretaceous): Mafic metavolcanic rocks with mostly subordinate graywacke and foliated graywacke, argillite and phyllitic argillite, chert, and marbleﾑHighly sheared and disrupted greenstone makes up from 20 to 50 percent of melange and contains relict clinopyroxene (some titaniferous) and plagioclase in an altered matrix of chlorite, carbonate minerals, and pumpellyite. Rare deformed pillows. Locally prehnite in veins. Volcanic subquartzose sandstone similar to sandstone in unit TKwg. Unit symbol in parenthesis (TKev) indicates block or inferred block in Helena-Haystack m四ange Enumerated_Domain: Enumerated_Domain_Value: TKea Enumerated_Domain_Value_Definition: ROCKS WEST OF THE STRAIGHT CREEK FAULT: Rocks southwest of the Darrington-Devils Mountain Fault Zone: Rocks of the eastern melange belt (middle Eocene to Late Cretaceous): ArgilliteﾑBlack, locally foliate argillite with limy concretions. Poorly exposed south of the town of White Horse. Locally cut by deformed and brecciated metadacite dikes Enumerated_Domain: Enumerated_Domain_Value: TKew Enumerated_Domain_Value_Definition: ROCKS WEST OF THE STRAIGHT CREEK FAULT: Rocks southwest of the Darrington-Devils Mountain Fault Zone: Rocks of the eastern melange belt (middle Eocene to Late Cretaceous): Volcanic rocks of Whitehorse MountainﾑPlagioclase-phyric pyroxene andesite and basaltic andesite ranging to dacite. Includes minor diabase and gabbro. Most rocks slightly metamorphosed and contain chlorite, pumpellyite, and prehnite. Forms massive cliffs. Amygdaloidal flow tops, breccia, tuff, and thin local sedimentary interbeds Enumerated_Domain: Enumerated_Domain_Value: TKec Enumerated_Domain_Value_Definition: ROCKS WEST OF THE STRAIGHT CREEK FAULT: Rocks southwest of the Darrington-Devils Mountain Fault Zone: Rocks of the eastern melange belt (middle Eocene to Late Cretaceous): ChertﾑMostly white-weathering, red or black ribbon chert and metachert making up to 20 to 80 percent of unit. Uniformly banded to complexly disrupted. Some chert as thin laminae in cherty argillite. Locally abundant greenstone, graywacke, and argillite. Vance (1957a, p. 221-222) reports considerable argillite and sandstone and several conglomerate beds on the west side of Three Fingers Enumerated_Domain: Enumerated_Domain_Value: Tkem Enumerated_Domain_Value_Definition: ROCKS WEST OF THE STRAIGHT CREEK FAULT: Rocks southwest of the Darrington-Devils Mountain Fault Zone: Rocks of the eastern melange belt (middle Eocene to Late Cretaceous): MarbleﾑGray to white, locally with chlorite; coarsely crystalline. Danner (1966, p. 326-329) describes the deposits south of White Horse; mostly in small pods Enumerated_Domain: Enumerated_Domain_Value: TKegb Enumerated_Domain_Value_Definition: ROCKS WEST OF THE STRAIGHT CREEK FAULT: Rocks southwest of the Darrington-Devils Mountain Fault Zone: Rocks of the eastern melange belt (middle Eocene to Late Cretaceous): GabbroﾑOn the South Fork of the Stillaguamish River, unit consists of gabbro, layered gabbro, and interlayered cumulate ultramafic rocks (wehrlite) (Dungan, 1974, p. 46-53). Includes some metatonalite and gneissic amphibolite. The large gabbro body mapped within the Helena-Haystack melange south of Darrington is medium grained and massive but laced with swarms of diabase dikes (Vance and others, 1980, p. 365). Gabbros are generally partially altered to albite, actinolite, epidote, and chlorite. Unit symbol in parenthesis (TKegb)indicates block or inferred block in Helena-Haystack m四ange Enumerated_Domain: Enumerated_Domain_Value: Tket Enumerated_Domain_Value_Definition: ROCKS WEST OF THE STRAIGHT CREEK FAULT: Rocks southwest of the Darrington-Devils Mountain Fault Zone: Rocks of the eastern melange belt (middle Eocene to Late Cretaceous): Zone of tectonized meta-igneous podsﾑDisrupted argillite, chert, and greenstone with abundant pods of tectonized metatonalite and metagabbro Enumerated_Domain: Enumerated_Domain_Value: TKeu Enumerated_Domain_Value_Definition: ROCKS WEST OF THE STRAIGHT CREEK FAULT: Rocks southwest of the Darrington-Devils Mountain Fault Zone: Rocks of the eastern melange belt (middle Eocene to Late Cretaceous): Ultramafic rocksﾑSerpentinite, metaperidotite, and metaclinopyroxenite. Dungan (1974, p. 48-53, 94) describes some ultramafic blocks with primary cumulus textures and others as harzburgite and dunite tectonite. Metamorphic minerals, mostly confined to rocks north of the South Fork of the Stillaguamish River are tremolite, talc, and olivine Enumerated_Domain: Enumerated_Domain_Value: MzPzg Enumerated_Domain_Value_Definition: ROCKS WEST OF THE STRAIGHT CREEK FAULT: Rocks northeast of the Darrington-Devils Mountain Fault Zone: Northwest Cascades System: Gabbroic intrusions (Mesozoic and Paleozoic)ﾑMostly metagabbro and metadiabase. Fine- to medium-grained granular or ophitic saussuritized plagioclase in fibrous matrix of green amphibole, chlorite, and epidote minerals. Grains are crushed, locally microbrecciated. Includes cataclastic tonalite northeast of Rockport Enumerated_Domain: Enumerated_Domain_Value: Kes Enumerated_Domain_Value_Definition: ROCKS WEST OF THE STRAIGHT CREEK FAULT: Rocks northeast of the Darrington-Devils Mountain Fault Zone: Northwest Cascades System: Easton Metamorphic Suite: Shuksan Greenschist (Early Cretaceous)ﾑPredominantly fine-grained greenschist, sodic actinolite-bearing greenschist, and (or) blueschist. Locally includes quartzitic greenschist, iron- and manganese-rich quartzite (metachert), greenstone, and graphitic phyllite. Rare relict clinopyroxene in some greenschist. Common also is leucogreenschist, generally with pumpellyite, characterized by a mosaic of albite porphyroblasts that have mineral inclusions aligned in the foliation. Common are epidote clots or balls, generally less than 1mm in diameter, and probably derived from vesicle fillings in the protolith basalt (Misch 1965; Haugerud, 1980, p. 39-44). Schists are commonly conspicuously layered on centimeter scale, and foliation and layering are tightly folded on outcrop scale. Locally interlayered with units Ked and Keds. Unit symbol in parenthesis (Kes)indicates block or inferred block in Helena-Haystack m四ange Enumerated_Domain: Enumerated_Domain_Value: Keg Enumerated_Domain_Value_Definition: ROCKS WEST OF THE STRAIGHT CREEK FAULT: Rocks northeast of the Darrington-Devils Mountain Fault Zone: Northwest Cascades System: Easton Metamorphic Suite: Garnet amphibolite (Early Cretaceous)ﾑGarnet amphibolite and muscovite-quartz schist, barroisite schist, hornblende-garnet rocks, and rare eclogite commonly surrounded by greenschist. Most of these rocks are coarser grained than typical Shuksan lithologies. The garnet amphibolite is overprinted by blueschist-facies metamorphism (Brown and others, 1982). Includes minor ultramafic rocks. Unit symbol in parenthesis (Keg)indicates block or inferred block in Helena-Haystack m四ange Enumerated_Domain: Enumerated_Domain_Value: Ked Enumerated_Domain_Value_Definition: ROCKS WEST OF THE STRAIGHT CREEK FAULT: Rocks northeast of the Darrington-Devils Mountain Fault Zone: Northwest Cascades System: Easton Metamorphic Suite: Darrington Phyllite (Early Cretaceous)ﾑPredominantly black, highly fissile sericite-graphite-albite-quartz phyllite, typically with abundant quartz veinlets; commonly complexly folded. Most phyllite has a strong crinkle lineation. Some well-foliated metasandstone. Locally interlayered wih unit Kes Enumerated_Domain: Enumerated_Domain_Value: Keds Enumerated_Domain_Value_Definition: ROCKS WEST OF THE STRAIGHT CREEK FAULT: Rocks northeast of the Darrington-Devils Mountain Fault Zone: Northwest Cascades System: Easton Metamorphic Suite: Darrington Phyllite (Early Cretaceous): Silver-colored phylliteﾑPredominantly fine-grained muscovite-rich phyllite or schist, commonly with lawsonite, locally with graphite and garnet. Some rocks with albite porphyroblasts. Dazzling bright in sunlight. Locally interlayered with unit Kes. Unit symbol in parenthesis (Keds)indicates block or inferred block in Helena-Haystack m四ange Enumerated_Domain: Enumerated_Domain_Value: Kem Enumerated_Domain_Value_Definition: ROCKS WEST OF THE STRAIGHT CREEK FAULT: Rocks northeast of the Darrington-Devils Mountain Fault Zone: Northwest Cascades System: Easton Metamorphic Suite: Mixed greenschist and phyllite (Early Cretaceous)ﾑInterlayered greenschist and black phyllite on a 1- to 10-m scale Enumerated_Domain: Enumerated_Domain_Value: Kems Enumerated_Domain_Value_Definition: ROCKS WEST OF THE STRAIGHT CREEK FAULT: Rocks northeast of the Darrington-Devils Mountain Fault Zone: Northwest Cascades System: Easton Metamorphic Suite: Mixed greenschist and phyllite (Early Cretaceous): Mixed greenschist and silver-colored phyllite Enumerated_Domain: Enumerated_Domain_Value: Keu Enumerated_Domain_Value_Definition: ROCKS WEST OF THE STRAIGHT CREEK FAULT: Rocks northeast of the Darrington-Devils Mountain Fault Zone: Northwest Cascades System: Easton Metamorphic Suite: Ultramafic rocks (Early Cretaceous)ﾑMostly serpentinite. Occurs in unit Keds and near faulted contacts with unit TKhm Enumerated_Domain: Enumerated_Domain_Value: Krs Enumerated_Domain_Value_Definition: ROCKS WEST OF THE STRAIGHT CREEK FAULT: Rocks northeast of the Darrington-Devils Mountain Fault Zone: Northwest Cascades System: Slate of Rinker Ridge (Early Cretaceous and Late Jurassic)ﾑPredominantly gray to brown, little-recrystallized slate and phyllite with local foliated sandstone and semischist Enumerated_Domain: Enumerated_Domain_Value: Kjb Enumerated_Domain_Value_Definition: ROCKS WEST OF THE STRAIGHT CREEK FAULT: Rocks northeast of the Darrington-Devils Mountain Fault Zone: Northwest Cascades System: Bell Pass melange (Early Cretaceous and Late Jurassic)ﾑMetagabbro, metadiorite, metatonalite, silicic gneiss, fine-grained epidote amphibolite gneiss, micaceous quartzite, amphibole schist, and ultramafic rocks. Lesser amounts of phyllitic argillite, cherty phyllite, chert, graywacke, semischist, metavolcanic rocks, and marble. Rocks highly variable, commonly mylonitic and (or) cataclastic Enumerated_Domain: Enumerated_Domain_Value: byan Enumerated_Domain_Value_Definition: ROCKS WEST OF THE STRAIGHT CREEK FAULT: Rocks northeast of the Darrington-Devils Mountain Fault Zone: Northwest Cascades System: Bell Pass melange (Early Cretaceous and Late Jurassic): Yellow Aster Complex of Misch (1966)ﾑMedium- to coarse-grained silicic and feldspathic gneisses and associated weakly deformed plutonic rocks. See text for discussion of age: Non-gneissic rocksﾑMostly metagabbro, metadiabase, and metatonalite with minor gneissic igneous rocks Enumerated_Domain: Enumerated_Domain_Value: byag Enumerated_Domain_Value_Definition: ROCKS WEST OF THE STRAIGHT CREEK FAULT: Rocks northeast of the Darrington-Devils Mountain Fault Zone: Northwest Cascades System: Bell Pass melange (Early Cretaceous and Late Jurassic): Yellow Aster Complex of Misch (1966): Gneissic rocksﾑSiliceous gneiss, pyroxene gneiss, and associated metagabbro, metadiabase, and metatonalite. Includes areas lacking siliceous gneiss but including meta-igneous rocks with strongly mylonitic quartz bands Enumerated_Domain: Enumerated_Domain_Value: bc Enumerated_Domain_Value_Definition: ROCKS WEST OF THE STRAIGHT CREEK FAULT: Rocks northeast of the Darrington-Devils Mountain Fault Zone: Northwest Cascades System: Bell Pass melange (Early Cretaceous and Late Jurassic): ChertﾑRibbon chert in large block north of White Chuck River Enumerated_Domain: Enumerated_Domain_Value: PDcs Enumerated_Domain_Value_Definition: ROCKS WEST OF THE STRAIGHT CREEK FAULT: Rocks northeast of the Darrington-Devils Mountain Fault Zone: Northwest Cascades System: Chilliwack Group of Cairnes (1944) (Permian to Devonian): Sedimentary rocksﾑWell-bedded, gray to brown and black argillite and volcanic subquartzose sandstone with minor pebble conglomerate and rare chert. Includes some volcanic rocks locally. Graded beds, scour structures, and load casts locally prominent; some rhythmite. Locally, sandstone beds strongly disrupted in argillite matrix. Rocks grade rapidly from little deformed to phyllitic with a pronounced foliation generally subparallel to bedding Enumerated_Domain: Enumerated_Domain_Value: PDcv Enumerated_Domain_Value_Definition: ROCKS WEST OF THE STRAIGHT CREEK FAULT: Rocks northeast of the Darrington-Devils Mountain Fault Zone: Northwest Cascades System: Chilliwack Group of Cairnes (1944) (Permian to Devonian): Volcanic and metavolcanic rocksﾑMostly greenstone, with subordinate meta-andesite and rare metadacite or metarhyolite. Breccia and tuff predominate. Mafic metavolcanic rocks commonly with relict plagioclase and clinopyroxene in a chlorite-epidote matrix, commonly with carbonate minerals. Plagioclase is mostly recrystallized as albite. Includes some gabbro and diabase Enumerated_Domain: Enumerated_Domain_Value: PDcl Enumerated_Domain_Value_Definition: ROCKS WEST OF THE STRAIGHT CREEK FAULT: Rocks northeast of the Darrington-Devils Mountain Fault Zone: Northwest Cascades System: Chilliwack Group of Cairnes (1944) (Permian to Devonian): Limestone and marbleﾑMostly coarsely crystalline, gray to black. Carbonate rocks in small isolated pods and blocks; locally fossiliferous Enumerated_Domain: Enumerated_Domain_Value: Kbl Enumerated_Domain_Value_Definition: ROCKS EAST OF THE STRAIGHT CREEK FAULT: Stitching units: Plutons of the tonalitic group: Tonalitic gneiss of Bench Lake (Late Cretaceous)ﾑMostly light colored, fine grained heterogeneous biotite tonalitic gneiss, locally with hornblende. Subhedral clinozoicite associated with mafic minerals. CI=3-19, mostly about 9･12. Layers and pods of finer grained biotite gneiss, garnet biotite-hornblende schist, and amphibolite locally making up 5-10 percent of rock. Mafic schlieren may be swirled. Cut by light-colored tonalite, pegmatite, and aplite dikes. Contact with unit Kblg is gradational Enumerated_Domain: Enumerated_Domain_Value: Kblg Enumerated_Domain_Value_Definition: ROCKS EAST OF THE STRAIGHT CREEK FAULT: Stitching units: Plutons of the tonalitic group: Tonalitic gneiss of Bench Lake (Late Cretaceous): Banded tonalitic gneissﾑStrongly layered fine-grained biotite-hornblende gneiss and light-colored biotite tonalite to granodioritic gneiss , As mapped, commonly contains garnet and thin and thick layers and pods of Napeequa Schist (Kns), especially hornblende schist and schistose hornblendite as well as some ultramafic rocks (Knu). Layers pinch and swell. Rocks are cut by many irregular pegmatite and aplite dikes and have a migmatitic aspect. Gneiss layers are crystalloblastic gneissose to granoblastic with heterogeneous grain size. Some biotite gneiss layers have subidioblastic to porphyroblastic plagioclase with faint relict euhedral zoning suggesting an igneous origin Enumerated_Domain: Enumerated_Domain_Value: Kng Enumerated_Domain_Value_Definition: ROCKS EAST OF THE STRAIGHT CREEK FAULT: Stitching units: Plutons of the tonalitic group: Nason Ridge Migmatitic Gneiss (Late Cretaceous)ﾑIn south, mostly heterogeneous light-colored tonalite to granodioritic gneiss interlayered with mica schist and amphibolite similar to the Chiwaukum Schist. Predominantly crystalloblastic. Most common lithology is medium-grained biotite gneiss with a slightly porphyroblastic appearance due to anastomosing mica layers surrounding larger plagioclase crystals or aggregate grains. Contacts between gneiss and schist are both sharp and gradational along and across strike. Cross-cutting sills, dikes, and irregular bodies of light-colored fine-grained to pegmatitic tonalite and gneiss are also abundant in migmatitic phases. Most of unit has 5 0 percent or more light-colored gneiss. Grades northward into more uniform, mostly medium grained garnet-biotite-quartz-oligoclase (or andesine) gneiss which is difficult to distinguish from Chiwaukum Schist. Rare rounded relict kyanite and sillimanite occur within sericite knots Enumerated_Domain: Enumerated_Domain_Value: Ksc Enumerated_Domain_Value_Definition: ROCKS EAST OF THE STRAIGHT CREEK FAULT: Stitching units: Plutons of the tonalitic group: Sloan Creek plutons (Late Cretaceous)ﾑBiotite-hornblende tonalitic gneiss, flaser gneiss, and local gneissic metatonalite; medium grained, homogeneous, crystalloblastic gneissose to strongly flaseroid; locally strongly mylonitic. CI=0-37, but for most rocks CI=20-30 (Ford and others, 1988, p. 71). Locally contains garnet. Plagioclase normally zoned or unzoned and strongly stress twinned but with relict patchy zoning and faint oscillatory zoning and synneusis twins (Heath, 1971, p. 62). Retrogressive alteration is pronounced but somewhat sporadic; epidote minerals and sericite commonly fill plagioclase cores; mafic minerals are altered to chlorite, sphene, and prehnite. As mapped, includes some interlayered flaser gneiss and Nason Ridge Migmatitic Gneiss (Kng) Enumerated_Domain: Enumerated_Domain_Value: Ktc Enumerated_Domain_Value_Definition: ROCKS EAST OF THE STRAIGHT CREEK FAULT: Stitching units: Plutons of the tonalitic group: Tenpeak pluton (Late Cretaceous): Contact zoneﾑDark-colored biotite-hornblende metatonalite and tonalitic gneiss, hornblende diorite, and hornblendite, locally with garnet; layers of garnet-hornblende-biotite schist increase to west. Pods of hornblendite and ultramafic rocks (R. A. Haugerud, written comm. 1993) suggest that much of of the country rock in this zone may be the Napeequa Schist. This description and others of the Tenpeak pluton adapted from Crowder and others (1966) Enumerated_Domain: Enumerated_Domain_Value: Ktd Enumerated_Domain_Value_Definition: ROCKS EAST OF THE STRAIGHT CREEK FAULT: Stitching units: Plutons of the tonalitic group: Tenpeak pluton (Late Cretaceous): Dark-colored metatonalite and tonalitic gneissﾑMedium-grained biotite-hornblende metadiorite and metatonalite. Xenoblastic to granoblastic with rare broken faintly oscillatory-zoned sodic andesine, commonly in a dark mesh of hornblende and biotite. CI=20-50. Rich in mafic lenses and streaks and hornblendite inclusions. Grades into unit Kti Enumerated_Domain: Enumerated_Domain_Value: Ktm Enumerated_Domain_Value_Definition: ROCKS EAST OF THE STRAIGHT CREEK FAULT: Stitching units: Plutons of the tonalitic group: Tenpeak pluton (Late Cretaceous): Metatonalite and tonalitic gneissﾑLight-colored medium-grained hornblende-biotite tonalite and tonalitic gneiss. Xenoblastic to hypidiomorphic, commonly with aligned euhedral hornblende prisms, locally as long as 1 cm. CI=15-20, locally as much as 40. Subhedral epidote and pseudomyrmekitic epidote common. Allanite and garnet occur on west margin of unit. Hornblende commonly zoned from brownish green to bluish green on rims. Sodic andesine crystals commonly broken and with faint euhedral oscillatory zoning Enumerated_Domain: Enumerated_Domain_Value: Kti Enumerated_Domain_Value_Definition: ROCKS EAST OF THE STRAIGHT CREEK FAULT: Stitching units: Plutons of the tonalitic group: Tenpeak pluton (Late Cretaceous): Interlayered rocksﾑLight-and dark-colored biotite-hornblende dioritic gneiss, tonalitic gneiss and flaser gneiss, and subordinate hornblende schist Enumerated_Domain: Enumerated_Domain_Value: Ktf Enumerated_Domain_Value_Definition: ROCKS EAST OF THE STRAIGHT CREEK FAULT: Stitching units: Plutons of the tonalitic group: Tenpeak pluton (Late Cretaceous): Flaser gneissﾑMedium-grained hornblende and (or) biotite tonalite flaser gneiss; texures are xenoblastic, porphyroclastic, and mylonitic. CI=20-40 Enumerated_Domain: Enumerated_Domain_Value: Kchb Enumerated_Domain_Value_Definition: ROCKS EAST OF THE STRAIGHT CREEK FAULT: Stitching units: Plutons of the tonalitic group: Chaval pluton (Late Cretaceous): Biotite-hornblende quartz diorite and dioriteﾑMostly medium grained biotite-hornblende quartz diorite, locally diorite or tonalite, with clinopyroxene and hypersthene locally and accessory iron-titanium oxide, allanite, zircon, and apatite. Textures are mostly igneous but near the margins become subid-ioblastic with little or no relict igneous texture except for rare euhedral oscillatory-zoned plagioclase. Margins of main pluton are gneissic and minerals are mylonitized and recrystallized. Flaser gneiss common. Metamorphic minerals are epidote, blue-green hornblende (commonly with cores of brown igneous(?) hornblende, biotite, and garnet). Some euhedrally zoned epidote. Descriptions modified from Boak (1977, p. 32-55) Enumerated_Domain: Enumerated_Domain_Value: Kchm Enumerated_Domain_Value_Definition: ROCKS EAST OF THE STRAIGHT CREEK FAULT: Stitching units: Plutons of the tonalitic group: Chaval pluton (Late Cretaceous): Mafic hornblende metadiorite, metaquartz diorite, and mafic amphiboliteﾑHeterogeneous, layered rocks with zones of unit Kchb and country rocks. Commonly rich in pegmatite and light-colored tonalite in sharply bounded dikes or irregular bodies with swirled, gradational contacts Enumerated_Domain: Enumerated_Domain_Value: Kchs Enumerated_Domain_Value_Definition: ROCKS EAST OF THE STRAIGHT CREEK FAULT: Stitching units: Plutons of the tonalitic group: Chaval pluton (Late Cretaceous): Sills and dikesﾑSills and dikes composed of mafic metadiorite and metaquartz diorite intrusive into the Chiwaukum Schist. Many layers of amphibolite. Sharply banded, tabular bodies of mafic rocks, similar to unit Kchm Enumerated_Domain: Enumerated_Domain_Value: Kgp Enumerated_Domain_Value_Definition: ROCKS EAST OF THE STRAIGHT CREEK FAULT: Stitching units: Plutons of the tonalitic group: Grassy Point stock (Late Cretaceous)ﾑLight･colored, medium- to coarse-grained biotite metatonalite to rare metagranodiorite with CI=5-50. Mostly uniform granitoid rocks with gneissic margins and rare rhythmic mafic layering. Hypidiomorphic granular with highly strained crystals and strong cataclasis. Rare relict euhedral oscillatory zoned oligoclase-andesine Enumerated_Domain: Enumerated_Domain_Value: Kdm Enumerated_Domain_Value_Definition: ROCKS EAST OF THE STRAIGHT CREEK FAULT: Stitching units: Plutons of the tonalitic group: Metadiorite (Late Cretaceous)ﾑWest of Lake Byrne [67] fine- to medium-grained hornblende and biotite-hornblende metadiorite and dioritic gneiss with CI=20-30. Xenoblastic to granoblastic with epidote-filled andesine, epidote, allanite, and garnet. Description adapted from Crowder and others (1966) Enumerated_Domain: Enumerated_Domain_Value: TKeb Enumerated_Domain_Value_Definition: ROCKS EAST OF THE STRAIGHT CREEK FAULT: Stitching units: Plutons of the granodioritic group: Eldorado Orthogneiss (middle Eocene to Late Cretaceous): Biotite-hornblende quartz monzodioritic gneissﾑMedium-grained subidioblastic to idioblastic sodic plagioclase with matrix of crystalloblastic to cataclastic quartz, K-feldspar, hornblende, biotite, and epidote; accessory sphene, apatite, zircon, and opaque oxides; commonly well aligned prismatic aggregates of hornblende and biotite, but in many rocks mafic minerals are aligned in a streaky planar fabric. Gradational over several hundred meters into unit Kef. Rock is granodiorite chemically, but _ 18O is less than 10(Ford and others, 1988, p.26; White and others, 1988, p. 30), a characteristic of the tonalitic group Enumerated_Domain: Enumerated_Domain_Value: TKef Enumerated_Domain_Value_Definition: ROCKS EAST OF THE STRAIGHT CREEK FAULT: Stitching units: Plutons of the granodioritic group: Eldorado Orthogneiss (middle Eocene to Late Cretaceous): Flaser gneissﾑFine- to medium-grained biotite-hornblende metagranodiorite and meta-quartz monzodiorite flaser gneiss, with mosaic sodic plagioclase patches and rare simple crystals set in a finer grained mylonitic matrix of quartz, plagioclase, and mafic minerals Enumerated_Domain: Enumerated_Domain_Value: TKhl Enumerated_Domain_Value_Definition: ROCKS EAST OF THE STRAIGHT CREEK FAULT: Stitching units: Plutons of the granodioritic group: Hidden Lake stock (middle Eocene to Late Cretaceous)ﾑBiotite metatonalite, based on modes, but rocks are granodiorite based on CIPW norms and d 18O values greater than 10 (Ford and others, 1988, p. 26; White and others, 1988, p. 30). Relict hypidiomorphic granular texture with plagioclase mostly filled with well-crystallized epidote and muscovite; some crushed grain margins have recrystallized, and quartz is sutured. Some K-feldspar is microcline. Rocks are massive and sharply intrusive Enumerated_Domain: Enumerated_Domain_Value: Kcl Enumerated_Domain_Value_Definition: ROCKS EAST OF THE STRAIGHT CREEK FAULT: Stitching units: Plutons of the granodioritic group: Cyclone Lake pluton (Late Cretaceous)ﾑLight-colored, fine- to medium-grained, muscovite-biotite metagranodiorite (meta･alaskite). Subhedral sodic plagioclase with relict euhedral oscillatory zoning in a matrix of quartz and microcline, locally blastomylonitic along foliation planes with sparse muscovite and biotite. Common myrmekite. Minor subhedral clinozoisite with rare allanite cores associated with micas. C.I. = 3-7 (Ford and others, 1988, p. 53). Faintly gneissic in outcrop. Rocks become coarser grained and more gneissic towards north margin of pluton where they grade abruptly into the Jordan Lakes pluton Enumerated_Domain: Enumerated_Domain_Value: Kjl Enumerated_Domain_Value_Definition: ROCKS EAST OF THE STRAIGHT CREEK FAULT: Stitching units: Plutons of the granodioritic group: Jordan Lakes pluton (Late Cretaceous)ﾑMedium-grained hornblende-biotite tonalite and granodiorite. Hypidiomorphic granular with euhedral to subhedral plagioclase with relict euhedral oscillatory zoning and locally filled with clinozoisite and muscovite and in a mesostasis of microcline or perthite. Myrmekite common. CI=5-21, generally 10-17 Enumerated_Domain: Enumerated_Domain_Value: Kdc Enumerated_Domain_Value_Definition: ROCKS EAST OF THE STRAIGHT CREEK FAULT: Stitching units: Plutons of the granodioritic group: Downey Creek sill complex (Late Cretaceous)ﾑMostly light colored muscovite-biotite metagranodiorite and granodioritic gneiss, locally metatonalite. CI=3-6 (Ford and others, 1988, p. 59). Crystalloblastic to porphyroblastic with insets of larger plagioclase in granofelsic, foliated matrix of quartz, oligoclase, K-feldspar including microcline, mica, garnet, epidote, and sphene. Ellipsoidal quartz mosaic aggregates suggest former quartz phenocrysts in some rocks. Some plagioclase with faint relict euhedral oscillatory zoning. Occurs mostly as sills and irregular masses into the Napeequa Schist (Kns) with intrusive contacts and metaporphyry apophyses. Schist inclusions in the pluton range from 10-70 percent. Includes small lenses in Milk Creek, along Canyon Creek, and a large sill in upper Sulphur Creek that have similar petrographic features Enumerated_Domain: Enumerated_Domain_Value: Ksmm Enumerated_Domain_Value_Definition: ROCKS EAST OF THE STRAIGHT CREEK FAULT: Stitching units: Plutons of the granodioritic group: Sulphur Mountain pluton (Late Cretaceous): Metagranodiorite and metatonaliteﾑMedium-grained hornblende-biotite metagranodiorite and metatonalite characterized by large clinopyroxene prisms as long as 8 cm and quartz augen as large as 1.4 cm with accessory subhedral clinozoisite. Textures are xenoblastic to hypidiomorphic. Sphene and rare garnet and allanite. Calcic oligoclase commonly has faint euhedral oscillatory zoning but is also highly filled with epidote. CI=5-19, mostly about Enumerated_Domain: Enumerated_Domain_Value: Ksmf Enumerated_Domain_Value_Definition: ROCKS EAST OF THE STRAIGHT CREEK FAULT: Stitching units: Plutons of the granodioritic group: Sulphur Mountain pluton (Late Cretaceous): Flaser gneissﾑOn east side of pluton, flaser gneiss consists of medium-grained hornblende-biotite tonalite flaser gneiss with layers and inclusions of clinopyroxene-hornblende schist, hornblende gneiss, biotite gneiss, and quartzite. On west side, unit is hornblende-biotite metatonalite and tonalite flaser gneiss with layers of hornblendite and hornblende schist (Crowder and others, 1966) Enumerated_Domain: Enumerated_Domain_Value: Kfc Enumerated_Domain_Value_Definition: ROCKS EAST OF THE STRAIGHT CREEK FAULT: Stitching units: Plutons of the granodioritic group: Foam Creek stock (Late Cretaceous)ﾑMedium-grained biotite metagranodiorite with distinctive decussate biotite books. CI=10-15, rarely 25 (Ford and others, 1988, p. 17). Hypidiomorphic granular with faint relict oscillatory zoned oligoclase-andesine. Commonly retrogressively altered. Margins are highly gneissic Enumerated_Domain: Enumerated_Domain_Value: Kca Enumerated_Domain_Value_Definition: ROCKS EAST OF THE STRAIGHT CREEK FAULT: Nason terrane: Chiwaukum Schist (Late Cretaceous): Biotite schist and amphiboliteﾑMostly fine grained to medium grained, well-laminated graphitic garnet-biotite･quartz-oligoclase (or andesine) schist, locally with cordierite, andalusite, staurolite, or kyanite and rarely with sillimanite. Abundant schistose amphibolite, fine-grained hornblende gneiss, hornblende-biotite schist, and less common calc-silicate schist and marble. Cut by dikes and sills of light-colored biotite tonalite and pegmatite. Grades into unit Kcgg Enumerated_Domain: Enumerated_Domain_Value: Kcm Enumerated_Domain_Value_Definition: ROCKS EAST OF THE STRAIGHT CREEK FAULT: Nason terrane: Chiwaukum Schist (Late Cretaceous): MarbleﾑThin to thick layers of coarsely crystalline white to gray marble, commonly with thin schist interbeds and associated calc･silicate schist Enumerated_Domain: Enumerated_Domain_Value: Kch Enumerated_Domain_Value_Definition: ROCKS EAST OF THE STRAIGHT CREEK FAULT: Nason terrane: Chiwaukum Schist (Late Cretaceous): Hornblende schist and amphiboliteﾑBlack to light-green, fine- to medium-grained garnet-hornblende-quartz-plagioclase schist, gneiss, and amphibolite. Lepidoblastic to granofelsic, rarely garbenschiefer, with pods or layers rich in biotite, clinopyroxene, and (or) epidote Enumerated_Domain: Enumerated_Domain_Value: Kcgg Enumerated_Domain_Value_Definition: ROCKS EAST OF THE STRAIGHT CREEK FAULT: Nason terrane: Chiwaukum Schist (Late Cretaceous): Garnet-graphite-mica schistﾑPredominantly very fine grained garnet-graphite-biotite-oligoclase (or andesine)-quartz schist with kyanite and (or) staurolite Enumerated_Domain: Enumerated_Domain_Value: TKcs Enumerated_Domain_Value_Definition: ROCKS EAST OF THE STRAIGHT CREEK FAULT: Chelan Mountains terrane: Rocks northeast of the Entiat Fault: Cascade River Schist (Tertiary and Late Cretaceous): Mica schist and amphiboliteﾑMostly fine grained, highly fissile, green, brown, and black micaceous schist ranging from phyllitic sericite-quartz schist t o granoblastic biotite- and muscovite-biotite-quartz-albite (or oligoclase) schist and fine-grained paragneiss. Many rocks have garnet; less commonly staurolite and kyanite. Rare chloritoid. Many rocks have blue-green tourmaline. Hornblende-biotite-andesine schist, garbenschiefer, and fine-grained amphibolite common. Calcareous mica schist locally. Hornblende is commonly blue-green. Relict clastic textures common in metasandstone; unit includes small-pebble metaconglomerate. Most descriptions abstracted from Tabor (1961, p. 81-115). On Spider Mountain, unit includes phyllitic quartz-rich schist, calcareous mica schist, grading to impure marble, and silicic metaporphyry Enumerated_Domain: Enumerated_Domain_Value: Kcc Enumerated_Domain_Value_Definition: ROCKS EAST OF THE STRAIGHT CREEK FAULT: Chelan Mountains terrane: Rocks southwest of the Entiat Fault: Cascade River Schist (Late Cretaceous): Metaconglomerate and plagioclase-rich mica schistﾑGray to dark-green rocks ranging from boulder conglomerate with weak foliation to highly schistose rocks in which pebble clasts are so highly attenuated that they are only visible on surfaces cut perpendicular t o lineation. Identifiable protoliths of clasts are quartzite, volcanic rocks, and granitoid rocks. Unmapped granule conglomerate rich in granitoid and metaquartzite clasts occurs elsewhere in the Cascade River Schist south of the North Fork of the Cascade River Enumerated_Domain: Enumerated_Domain_Value: TKcc Enumerated_Domain_Value_Definition: ROCKS EAST OF THE STRAIGHT CREEK FAULT: Chelan Mountains terrane: Rocks northeast of the Entiat Fault: Cascade River Schist (Tertiary and Late Cretaceous): Metaconglomerate and plagioclase-rich mica schistﾑGray t o dark-green rocks ranging from boulder conglomerate with weak foliation to highly schistose rocks in which pebble clasts are so highly attenuated that they are only visible on surfaces cut perpendicular to lineation. Identifiable protoliths of clasts are quartzite, volcanic rocks, and granitoid rocks. Unmapped granule conglomerate rich in granitoid and metaquartzite clasts occurs elsewhere in the Cascade River Schist south of the North Fork of the Cascade River Enumerated_Domain: Enumerated_Domain_Value: Kcmv Enumerated_Domain_Value_Definition: ROCKS EAST OF THE STRAIGHT CREEK FAULT: Chelan Mountains terrane: Rocks southwest of the Entiat Fault: Cascade River Schist (Tertiary and Late Cretaceous): Metavolcanic rocks (Late Cretaceous)ﾑFine-grained leucogreenschists, commonly with relict highly flattened phenocrysts of plagioclase or mafic minerals Enumerated_Domain: Enumerated_Domain_Value: Kmd Enumerated_Domain_Value_Definition: ROCKS EAST OF THE STRAIGHT CREEK FAULT: Chelan Mountains terrane: Rocks southwest of the Entiat Fault: Marblemount pluton (Cretaceous): Meta-quartz dioriteﾑHornblende meta-quartz diorite, metatonalite, and tonalitic gneiss; minor metadiorite, hornblendite, and schistose hornblendite. Light-colored metatonalite dikes. Most common rock type has CI =16-54 (Ford and others, 1988, p. 96). West of the Entiat Fault and in the South Fork of the Cascade River area, the rocks are medium grained, pale green, containing numerous anastomosing shears rich in chlorite, epidote, and actinolitic hornblende, and vary from massive with relict hypidiomorphic granular texture to highly foliate and mylonitic. Sodic plagioclase commonly unzoned, complexly twinned and filled with epidote and (or) white mica. East of the Cascade River South Fork, rocks are progressively more recrystallized to the southeast with pronounced metamorphic segregation, well-recrystallized blue-green hornblende, and local biotite Enumerated_Domain: Enumerated_Domain_Value: TKmd Enumerated_Domain_Value_Definition: ROCKS EAST OF THE STRAIGHT CREEK FAULT: Chelan Mountains terrane: Rocks northeast of the Entiat Fault: Marblemount pluton (Tertiary and Late Cretaceous): Meta-quartz dioriteﾑHornblende meta-quartz diorite, metatonalite, and tonalitic gneiss; minor metadiorite, hornblendite, and schistose hornblendite. Light-colored metatonalite dikes. Most common rock type has CI =16-54 (Ford and others, 1988, p. 96). West of the Entiat Fault and in the South Fork of the Cascade River area, the rocks are medium grained, pale green, containing numerous anastomosing shears rich in chlorite, epidote, and actinolitic hornblende, and vary from massive with relict hypidiomorphic granular texture to highly foliate and mylonitic. Sodic plagioclase commonly unzoned, complexly twinned and filled with epidote and (or) white mica. East of the Cascade River South Fork, rocks are progressively more recrystallized to the southeast with pronounced metamorphic segregation, well-recrystallized blue-green hornblende, and local biotite Enumerated_Domain: Enumerated_Domain_Value: Kmf Enumerated_Domain_Value_Definition: ROCKS EAST OF THE STRAIGHT CREEK FAULT: Chelan Mountains terrane: Rocks southwest of the Entiat Fault: Marblemount pluton (Late Cretaceous): Flaser gneissﾑDark-colored epidote-chlorite-muscovite-quartz-plagioclase flaser gneiss, locally with chlorite schist. Subhedral to subidioblastic sodic plagioclase in a foliate matrix, locally with biotite Enumerated_Domain: Enumerated_Domain_Value: TKmf Enumerated_Domain_Value_Definition: ROCKS EAST OF THE STRAIGHT CREEK FAULT: Chelan Mountains terrane: Rocks northeast of the Entiat Fault: Marblemount pluton (Tertiary and Late Cretaceous): Flaser gneissﾑDark-colored epidote-chlorite-muscovite-quartz･plagioclase flaser gneiss, locally with chlorite schist. Subhedral to subidioblastic sodic plagioclase in a foliate matrix, locally with biotite Enumerated_Domain: Enumerated_Domain_Value: TKmm Enumerated_Domain_Value_Definition: ROCKS EAST OF THE STRAIGHT CREEK FAULT: Chelan Mountains terrane: Rocks northeast of the Entiat Fault: Magic Mountain Gneiss (Tertiary and Late Cretaceous)ﾑLight-colored chlorite-muscovite-epidote-plagioclase gneiss or flaser gneiss interlayered with chlorite-epidote-quartz-albite schist, locally with garnet and hornblende. Plagioclase, strikingly filled with epidote, is mostly albite and oligoclase; epidote is strongly zoned, mostly to iron-rich rims; chlorite is typically Mg rich. The gneiss layers range from flaseroid with epidote-filled plagioclase insets in a blastomylonitic quartz matrix to strongly layered quartz and albite rocks with numerous stringers of epidote and chlorite. Gneiss layers and greenschist layers are most commonly separated, but gradations occur. Scale of layering ranges from 5 cm to 6 m, but near the contact with the Cascade River Schist, greenschist layers increase in thickness and may be as thick as 60 m. Locally this contact is marked by a monolithologic breccia of equidimensional light-colored gneiss clasts, commonly augen shaped and as large as10 cm in a greenschist matrix. Descriptions abstracted from Tabor (1961) Enumerated_Domain: Enumerated_Domain_Value: TKns Enumerated_Domain_Value_Definition: ROCKS EAST OF THE STRAIGHT CREEK FAULT: Chelan Mountains terrane: Rocks northeast of the Entiat Fault: Napeequa Schist (Tertiary and Late Cretaceous): Mica-quartz schist and hornblende schistﾑPredominantly fine grained, mica-quartz schist, hornblende schist, amphibolite, hornblende-mica schist, garnet-biotite schist and minor hornblende-zoisite schist, hornblende garbenschiefer, calc-silicate schist, marble, and ultramafic rock. In the Cascade River area and in the Straight Creek Fault Zone, phyllitic muscovite-chlorite-quartz schist predominates. Rocks are mostly white, tan, brown to black, locally greenish with conspicuous compositional banding. Fine lamellar foliation, locally blastomylonitic. Evenly spaced quartz-rich layers, 1-10 cm thick, in mica-quartz schist suggest relict chert bedding, especially prominent north of Illabot Creek and locally along Downey Creek. On outcrop scale the schist is isoclinally folded, commonly crenulated or contorted; small crinkle folds on prominent S-surfaces Enumerated_Domain: Enumerated_Domain_Value: Kns Enumerated_Domain_Value_Definition: ROCKS EAST OF THE STRAIGHT CREEK FAULT: Chelan Mountains terrane: Rocks southwest of the Entiat Fault: Napeequa Schist (Late Cretaceous): Mica-quartz schist and hornblende schistﾑPredominantly fine grained, mica-quartz schist, hornblende schist, amphibolite, hornblende-mica schist, garnet-biotite schist and minor hornblende-zoisite schist, hornblende garbenschiefer, calc-silicate schist, marble, and ultramafic rock. In the Cascade River area and in the Straight Creek Fault Zone, phyllitic muscovite-chlorite-quartz schist predominates. Rocks are mostly white, tan, brown to black, locally greenish with conspicuous compositional banding. Fine lamellar foliation, locally blastomylonitic. Evenly spaced quartz-rich layers, 1-10 cm thick, in mica-quartz schist suggest relict chert bedding, especially prominent north of Illabot Creek and locally along Downey Creek. On outcrop scale the schist is isoclinally folded, commonly crenulated or contorted; small crinkle folds on prominent S-surfaces Enumerated_Domain: Enumerated_Domain_Value: Knm Enumerated_Domain_Value_Definition: ROCKS EAST OF THE STRAIGHT CREEK FAULT: Chelan Mountains terrane: Rocks southwest of the Entiat Fault: Napeequa Schist (Tertiary and Late Cretaceous): MarbleﾑCoarsely crystalline white marble grading into calcareous schist and locally calc-silicate schist Enumerated_Domain: Enumerated_Domain_Value: Knu Enumerated_Domain_Value_Definition: ROCKS EAST OF THE STRAIGHT CREEK FAULT: Chelan Mountains terrane: Rocks southwest of the Entiat Fault: Napeequa Schist (Tertiary and Late Cretaceous): Ultramafic rocksﾑThick, large layers along Downey Creek are mostly metadunite (Grant, 1966, p. 110). Other bodies are serpentinized metadunite and metaperidotite. Rocks are dark green to black on fresh surfaces, weathering rusty orange t o brown with relics of olivine in a felted mat of antigorite, talc, and tremolite (Crowder and others, 1966). The large body on Jordan Creek is mostly serpentinized peridotite (Bryant, 1955, p. 51･53). Many small pods of talc-tremolite schist are unmapped Enumerated_Domain: Enumerated_Domain_Value: Ksg Enumerated_Domain_Value_Definition: ROCKS EAST OF THE STRAIGHT CREEK FAULT: Swakane terrane: Swakane Biotite Gneiss (Late Cretaceous)ﾑBiotite-quartz-oligoclase gneiss, medium-grained, locally with garnet. Generally granofelsic to schistose but remarkably uniform and unlayered. Foliation folded on a small scale and swirled locally. Rare layers of hornblende schist. Cut by numerous sills and dikes of light-colored tonalite and tonalitic gneiss Enumerated_Domain: Enumerated_Domain_Value: wa Enumerated_Domain_Value_Definition: water Enumerated_Domain: Enumerated_Domain_Value: gl Enumerated_Domain_Value_Definition: glacier Spatial_Data_Organization_Information: srlines Direct_Spatial_Reference_Method: Vector Point_and_Vector_Object_Information: SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: Entity point Point_and_Vector_Object_Count: 0 SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: Complete chain Point_and_Vector_Object_Count: 122 SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: Point Point_and_Vector_Object_Count: 2 8 Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Planar: Map_Projection: Map_Projection_Name: Transverse Mercator Transverse_Mercator: Scale_Factor_at_Central_Meridian: 0.999600 Longitude_of_Central_Meridian: -123.000000 Latitude_of_Projection_Origin: 0.000000 False_Easting: 500000.000000 False_Northing: 0.000000 Planar_Coordinate_Information: Planar_Coordinate_Encoding_Method: coordinate pair Coordinate_Representation: Abscissa_Resolution: 0.000128 Ordinate_Resolution: 0.000128 Planar_Distance_Units: meters Geodetic_Model: Horizontal_Datum_Name: D_Clarke_1866 Ellipsoid_Name: Clarke 1866 Semi-major_Axis: 6378206.400000 Denominator_of_Flattening_Ratio: 294.978698 Entity_and_Attribute_Information: Detailed_Description: Entity_Type: Entity_Type_Label: srlines.aat Attribute: Attribute_Label: FID Attribute_Definition: Internal feature number. 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Attribute_Definition_Source: ESRI Attribute: Attribute_Label: LTYPE Attribute_Definition: locations of fold axis, isograd, topographic escarpment and cross-section line Attribute_Definition_Source: Author Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: f.a., fold axis, certain Enumerated_Domain_Value_Definition: Axial trace of fold based on strike and dip of bedding. Enumerated_Domain: Enumerated_Domain_Value: f.a., fold axis, concealed Enumerated_Domain_Value_Definition: Axial trace of fold based on strike and dip of bedding, where beds defining fold are hidden beneath younger unfolded materials Enumerated_Domain: Enumerated_Domain_Value: isograd Enumerated_Domain_Value_Definition: Mineral isograd Enumerated_Domain: Enumerated_Domain_Value: topographic, escarpment Enumerated_Domain_Value_Definition: River-cut terrace boundary Enumerated_Domain: Enumerated_Domain_Value: xsect Enumerated_Domain_Value_Definition: Location of cross-sections on printed map. Spatial_Data_Organization_Information: srfoldsymb Direct_Spatial_Reference_Method: Vector Point_and_Vector_Object_Information: SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: Entity point Point_and_Vector_Object_Count: 1 7 SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: Complete chain Point_and_Vector_Object_Count: 0 SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: Point Point_and_Vector_Object_Count: 3 7 Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Planar: Map_Projection: Map_Projection_Name: Transverse Mercator Transverse_Mercator: Scale_Factor_at_Central_Meridian: 0.999600 Longitude_of_Central_Meridian: -123.000000 Latitude_of_Projection_Origin: 0.000000 False_Easting: 500000.000000 False_Northing: 0.000000 Planar_Coordinate_Information: Planar_Coordinate_Encoding_Method: coordinate pair Coordinate_Representation: Abscissa_Resolution: 0.000128 Ordinate_Resolution: 0.000128 Planar_Distance_Units: meters Geodetic_Model: Horizontal_Datum_Name: D_Clarke_1866 Ellipsoid_Name: Clarke 1866 Semi-major_Axis: 6378206.400000 Denominator_of_Flattening_Ratio: 294.978698 Entity_and_Attribute_Information: Detailed_Description: Entity_Type: Entity_Type_Label: srfoldsymb.pat Attribute: Attribute_Label: FID Attribute_Definition: Internal feature number. 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Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Sequential unique whole numbers that are automatically generated. Attribute: Attribute_Label: SRFOLDSYMB-ID Attribute_Definition: User-defined feature number. Attribute_Definition_Source: ESRI Attribute: Attribute_Label: PTTYPE Attribute_Definition: location points for map symbol for large folds and arrowhead for plunge Attribute_Definition_Source: Author Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: f.a., syncline, certain Enumerated_Domain_Value_Definition: Syncline Enumerated_Domain: Enumerated_Domain_Value: _l_anticline_i_ Enumerated_Domain_Value_Definition: Overturned anticline Enumerated_Domain: Enumerated_Domain_Value: f.a. anticline, certain Enumerated_Domain_Value_Definition: Anticline Enumerated_Domain: Enumerated_Domain_Value: plunge Enumerated_Domain_Value_Definition: Arrowhead on trace of fold axis showing direction of plunge Spatial_Data_Organization_Information: srsamp_smoc Direct_Spatial_Reference_Method: Vector Point_and_Vector_Object_Information: SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: Entity point Point_and_Vector_Object_Count: 220 SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: Complete chain Point_and_Vector_Object_Count: 0 SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: Point Point_and_Vector_Object_Count: 4 5 SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: Label point Point_and_Vector_Object_Count: 0 Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Planar: Map_Projection: Map_Projection_Name: Transverse Mercator Transverse_Mercator: Scale_Factor_at_Central_Meridian: 0.999600 Longitude_of_Central_Meridian: -123.000000 Latitude_of_Projection_Origin: 0.000000 False_Easting: 500000.000000 False_Northing: 0.000000 Planar_Coordinate_Information: Planar_Coordinate_Encoding_Method: coordinate pair Coordinate_Representation: Abscissa_Resolution: 0.000128 Ordinate_Resolution: 0.000128 Planar_Distance_Units: meters Geodetic_Model: Horizontal_Datum_Name: D_Clarke_1866 Ellipsoid_Name: Clarke 1866 Semi-major_Axis: 6378206.400000 Denominator_of_Flattening_Ratio: 294.978698 Entity_and_Attribute_Information: Detailed_Description: srsamp_smoc Entity_Type: Entity_Type_Label: srsamp_smoc.pat Attribute: Attribute_Label: FID Attribute_Definition: Internal feature number. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Sequential unique whole numbers that are automatically generated. Attribute: Attribute_Label: Shape Attribute_Definition: Feature geometry. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Coordinates defining the features. Attribute: Attribute_Label: AREA Attribute_Definition: Area of feature in internal units squared. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Area is always zero for point coverages. Values are automatically generated. Attribute: Attribute_Label: PERIMETER Attribute_Definition: Perimeter of feature in internal units. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Perimeter is always zero for point coverages. Values are automatically generated. Attribute: Attribute_Label: SRSAMP_SMOC# Attribute_Definition: Internal feature number. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Sequential unique whole numbers that are automatically generated. Attribute: Attribute_Label: SRSAMP_SMOC-ID Attribute_Definition: User-defined feature number. Attribute_Definition_Source: ESRI Attribute Attribute_Label: PTTYPE Attribute_Definition: Location of sample dated by radiometric or fission track methodes, location of chemically analysed sample from Magic Mountain Gneiss, locations of reported fossils, and, locations of small outcrop of Vedder Complex, limestone (marble), or ultramafic rock to small to show at map scale. Attribute_Definition_Source: Author Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: age Enumerated_Domain_Value_Definition: radiometric or fission-track age Enumerated_Domain: Enumerated_Domain_Value: fossil locality Enumerated_Domain_Value_Definition: Fossil locality with identified fossil. See Table 1 in published text keyed to sample number (http://pubs.usgs.gov/imap/i2592/) Enumerated_Domain: Enumerated_Domain_Value: chem Enumerated_Domain_Value_Definition: Location of sample collected for chemical analysis. See Table 5 in published text keyed to mapno (http://pubs.usgs.gov/imap/i2592/) Enumerated_Domain: Enumerated_Domain_Value: ls Enumerated_Domain_Value_Definition: Small outcrop of limestone or marble, too small t o show at map scale. Includes Rocks of the western melange belt: Marble and limestone (Tkwm)ﾑMostly coarsely crystalline, dark-gray to white marble in small to moderate-size pods. Mostly massive but locally bedded with bioclastic layers; Trafton terrane of Whetten and others (1988)(TKtm): Marble and limestoneﾑSimilar to unit TKwm. Locally highly fossiliferous bioclastic limestone such as at the abandoned Morcrop quarry on the north side of Porter Creek; Rocks of the eastern melange belt: Marble (bm)ﾑGray to white, locally with chlorite; coarsely crystalline. Danner (1966, p. 326-329) describes the deposits south of White Horse; Bell Pass melange: MarbleﾑCoarsley crystalline marble exposed on Prarie Mountain; Chilliwack Group of Cairnes (1944): Limestone and marble (PDcl)ﾑMostly coarsely crystalline, gray to black. Carbonate rocks in small isolated pods and blocks; locally fossiliferous; Chiwaukum Schist: Marble (Kcm)ﾑThin to thick layers of coarsely crystalline white to gray marble, commonly with thin schist interbeds and associated calc-silicate schist; Cascade River Schist: Marble (Tkcma)ﾑCoarsely crystalline gray to white marble with many impurities of quartz, plagioclase, and mica. Grades into calcareous mica schist; and Napeequa Schist: Marble (Tknm, Knm)ﾑCoarsely crystalline white marble grading into calcareous schist and locally calc-silicate schist. Enumerated_Domain: Enumerated_Domain_Value: bv Enumerated_Domain_Value_Definition: Small outcrop of: Bell Pass melange: Vedder Complex of Armstrong and others (1983)ﾑAmphibolite, blueschist, micaceous quartzite, and mica-quartz schist. Enumerated_Domain: Enumerated_Domain_Value: um Enumerated_Domain_Value_Definition: Small outcrop of ultramafic rock, too small to show at map scale, includes Rocks of the western melange belt: Ultramafic rocks (Tkwu)ﾑSerpentinized peridotite and dunite. Nearby Tertiary plutons have recrystallized ultramafic rocks to higher grade assemblages, locally with enstatite and talc; Rocks of the eastern melange belt: Ultramafic rocks (Tkeu)ﾑSerpentinite, metaperidotite, and metaclinopyroxenite. Dungan (1974, p. 48-53, 94) describes some ultramafic blocks with primary cumulus textures and others as harzburgite and dunite tectonite. Metamorphic minerals, mostly confined to rocks north of the South Fork of the Stillaguamish River are tremolite, talc, and olivine; Easton Metamorphic Suite: Ultramafic rocks (Keu)ﾑMostly serpentinite. Occurs in unit Keds and near faulted contacts with unit TKhm; Bell Pass melange: Ultramafic rocks (bu)ﾑCommonly serpentinite; occurs along faults in the Prairie Mountain area; Chiwaukum Schist: Ultramafic rocks (Kcu); and Napeequa Schist: Ultramafic rocks (Tknu, Knu)ﾑThick, large layers along Downey Creek are mostly metadunite (Grant, 1966, p. 110). Other bodies are serpentinized metadunite and metaperidotite. Rocks are dark green to black on fresh surfaces, weathering rusty orange to brown with relics of olivine in a felted mat of antigorite, talc, and tremolite (Crowder and others, 1966). The large body on Jordan Creek is mostly serpentinized peridotite (Bryant, 1955, p. 51-53). Attribute: Attribute_Label: SAMPNO Attribute_Definition: Field number of rock sample analysed for age determination or chemical content Attribute_Definition_Source: Author Attribute: Attribute_Label: DESCRIPTION Attribute_Definition: additional information about sample, includes, comments on lithology, age, minerals analysed for radiometric age etc. Attribute: Attribute_Label: AGE Attribute_Definition: age(s) of samples dated by radimetric or fission track methodes. See Table 2 in published text keyed to mapno (http://pubs.usgs.gov/imap/i2592/) Attribute: Attribute_Label: REFERENCE Attribute_Definition: bibliographic reference for age of sample; see References Cited in map text (see http://pubs.usgs.gov/imap/i2592/) Attribute: Attribute_Label: MAPNO Attribute_Definition: number on printed map if pttype = fossil locsality, age, or chem; keyed t o Tables 1, 2 or 5 respectively (see http://pubs.usgs.gov/imap/i2592/) Attribute: Attribute_Label: UNIT Attribute_Definition: Source unit of sample. Attribute_Definition_Source: Author Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Barlow Pass Enumerated_Domain_Value_Definition: Barlow Pass Volcanics of Vance (1957a, b) (late and middle Eocene): Volcanic rocksﾑBasaltic andesite, basalt and, rhyolite in flows, breccia, and tuff interbedded with tuffaceous to feldspathic sandstone, conglomerate, and minor argillite. Basalt in the upper part of the section forms dark brown columnar flows. Basaltic andesite occurring lower in section is generally dark-green to gray, aphyric, massive, and dense. Rhyolite occurs as thick flows, typically weathering light-green to white with flow laminations; commonly spherulitic. Volcanic rocks are mostly highly altered to a dense mat of chlorite, epidote, calcite, and sericite; porphyritic and trachytoid textures are relict. Bedding in volcanic rocks is obscure except in some water-laid tuffs Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: basalt dike Enumerated_Domain_Value_Definition: basalt dike as described in Bectal Inc. (1979) Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Bell Pass melange Enumerated_Domain_Value_Definition: Bell Pass melange (Early Cretaceous and Late Jurassic)ﾑMetagabbro, metadiorite, metatonalite, silicic gneiss, fine-grained epidote amphibolite gneiss, micaceous quartzite, amphibole schist, and ultramafic rocks. Lesser amounts of phyllitic argillite, cherty phyllite, chert, graywacke, semischist, metavolcanic rocks, and marble. Rocks highly variable, commonly mylonitic and (or) cataclastic: Yellow Aster Complex of Misch (1966)ﾑ Gneissic rocksﾑSiliceous gneiss, pyroxene gneiss, and associated metagabbro, metadiabase, and metatonalite. Includes areas lacking siliceous gneiss but including meta-igneous rocks with strongly mylonitic quartz bands and Vedder Complex of Armstrong and others (1983)ﾑAmphibolite, blueschist, micaceous quartzite, and mica-quartz schist. Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Cascade Pass dike Enumerated_Domain_Value_Definition: Cascade Pass dike (Miocene)ﾑ TonaliteﾑMedium-grained hornblende-biotite tonalite, hypidiomorphic granular with small glomeroporphyrocrysts of mafic minerals. Massive and coarsely jointed, with local areas of disseminated sulfide minerals. The dike has fine-grained, porphyritic, chilled margins; contact lit-par-lit complexes are common, and alteration is pervasive locally Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Chaval pluton Enumerated_Domain_Value_Definition: Chaval pluton (Late Cretaceous): Biotite-hornblende quartz diorite and dioriteﾑMostly medium grained biotite-hornblende quartz diorite, locally diorite or tonalite, with clinopyroxene and hypersthene locally and accessory iron-titanium oxide, allanite, zircon, and apatite. Textures are mostly igneous but near the margins become subid-ioblastic with little or no relict igneous texture except for rare euhedral oscillatory-zoned plagioclase. Margins of main pluton are gneissic and minerals are mylonitized and recrystallized. Flaser gneiss common. Metamorphic minerals are epidote, blue-green hornblende (commonly with cores of brown igneous(?) hornblende, biotite, and garnet). Some euhedrally zoned epidote. Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Chilliwack Gp. Enumerated_Domain_Value_Definition: Chilliwack Group of Cairnes ( 1 9 4 4 ) (Permian to Devonian): Sedimentary rocksﾑWell-bedded, gray to brown and black argillite and volcanic subquartzose sandstone with minor pebble conglomerate and rare chert. Includes some volcanic rocks locally. Graded beds, scour structures, and load casts locally prominent; some rhythmite. Locally, sandstone beds strongly disrupted in argillite matrix. Rocks grade rapidly from little deformed to phyllitic with a pronounced foliation generally subparallel to bedding and Limestone and marbleﾑMostly coarsely crystalline, gray to black. Carbonate rocks in small isolated pods and blocks; locally fossiliferous Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Chiwaukum Schist Enumerated_Domain_Value_Definition: Chiwaukum Schist (Late Cretaceous): Biotite schist and amphiboliteﾑMostly fine grained to medium grained, well-laminated graphitic garnet-biotite-quartz-oligoclase (or andesine) schist, locally with cordierite, andalusite, staurolite, or kyanite and rarely with sillimanite. Abundant schistose amphibolite, fine-grained hornblende gneiss, hornblende-biotite schist, and less common calc-silicate schist and marble. Cut by dikes and sills of light-colored biotite tonalite and pegmatite; Hornblende schist and amphiboliteﾑBlack to light-green, fine- to medium-grained garnet-hornblende-quartz-plagioclase schist, gneiss, and amphibolite. Lepidoblastic to granofelsic, rarely garbenschiefer, with pods or layers rich in biotite, clinopyroxene, and (or) epidote; and Garnet-graphite-mica schistﾑPredominantly very fine grained garnet-graphite-biotite-oligoclase (or andesine)-quartz schist with kyanite and (or) staurolite Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Nason Ridge Mig.Gn. Enumerated_Domain_Value_Definition: Nason Ridge Migmatitic Gneiss (Late Cretaceous)ﾑIn south, mostly heterogeneous light-colored tonalite to granodioritic gneiss interlayered with mica schist and amphibolite similar to the Chiwaukum Schist. Predominantly crystalloblastic. Most common lithology is medium-grained biotite gneiss with a slightly porphyroblastic appearance due to anastomosing mica layers surrounding larger plagioclase crystals or aggregate grains. Contacts between gneiss and schist are both sharp and gradational along and across strike. Cross-cutting sills, dikes, and irregular bodies of light-colored fine-grained to pegmatitic tonalite and gneiss are also abundant in migmatitic phases. Most of unit has 5 0 percent or more light-colored gneiss. Grades northward into more uniform, mostly medium grained garnet-biotite-quartz-oligoclase (or andesine) gneiss which is difficult to distinguish from Chiwaukum Schist. Rare rounded relict kyanite and sillimanite occur within sericite knots Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Cloudy Pass bath Enumerated_Domain_Value_Definition: Cloudy Pass batholith and associated rocks (Miocene): Granodiorite, tonalite, and gabbro, undivided Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Cool Glacier stock Enumerated_Domain_Value_Definition: Cool Glacier stock: GranodioriteﾑPyroxene･biotite-hornblende granodiorite and quartz monzodiorite. Medium grained, hypidiomorphic granular Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Cyclone Lake pluton Enumerated_Domain_Value_Definition: Cyclone Lake pluton (Late Cretaceous)ﾑLight-colored, fine- to medium-grained, muscovite-biotite metagranodiorite (meta･alaskite). Subhedral sodic plagioclase with relict euhedral oscillatory zoning in a matrix of quartz and microcline, locally blastomylonitic along foliation planes with sparse muscovite and biotite. Common myrmekite. Minor subhedral clinozoisite with rare allanite cores associated with micas. C.I. = 3-7 (Ford and others, 1988, p. 53). Faintly gneissic in outcrop. Rocks become coarser grained and more gneissic towards north margin of pluton where they grade abruptly into the Jordan Lakes pluton Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: dioritic stock Enumerated_Domain_Value_Definition: dioritic stock as described in Bectal Inc. (1979) Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Easton Meta. Suite Enumerated_Domain_Value_Definition: Easton Metamorphic Suite: Shuksan Greenschist (Early Cretaceous)ﾑPredominantly fine-grained greenschist, sodic actinolite-bearing greenschist, and (or) blueschist. Locally includes quartzitic greenschist, iron- and manganese-rich quartzite (metachert), greenstone, and graphitic phyllite. Rare relict clinopyroxene in some greenschist. Common also is leucogreenschist, generally with pumpellyite, characterized by a mosaic of albite porphyroblasts that have mineral inclusions aligned in the foliation. Common are epidote clots or balls, generally less than 1mm in diameter, and probably derived from vesicle fillings in the protolith basalt (Misch 1965; Haugerud, 1980, p. 39-44). Schists are commonly conspicuously layered on centimeter scale, and foliation and layering are tightly folded on outcrop scale. Locally interlayered with units Ked and Keds; Garnet amphibolite (Early Cretaceous)ﾑGarnet amphibolite and muscovite-quartz schist, barroisite schist, hornblende-garnet rocks, and rare eclogite commonly surrounded by greenschist. Most of these rocks are coarser grained than typical Shuksan lithologies. The garnet amphibolite is overprinted by blueschist-facies metamorphism (Brown and others, 1982): Darrington Phyllite (Early Cretaceous)ﾑPredominantly black, highly fissile sericite-graphite-albite-quartz phyllite, typically with abundant quartz veinlets; commonly complexly folded. Most phyllite has a strong crinkle lineation. Some well-foliated metasandstone. Locally interlayered wih unit Kes; and Mixed greenschist and silver-colored phyllite Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: EMB Enumerated_Domain_Value_Definition: Rocks of the eastern melange belt (middle Eocene to Late Cretaceous): Mafic metavolcanic rocks with mostly subordinate graywacke and foliated graywacke, argillite and phyllitic argillite, chert, and marble: ArgilliteﾑBlack, locally foliate argillite with limy concretions; ChertﾑMostly white-weathering, red or black ribbon chert and metachert making up to 20 to 80 percent of unit. Uniformly banded to complexly disrupted. Some chert as thin laminae in cherty argillite; MarbleﾑGray to white, locally with chlorite; coarsely crystalline. Danner (1966, p. 326-329) describes the deposits south of White Horse; mostly in small pods.; and GabbroﾑOn the South Fork of the Stillaguamish River, unit consists of gabbro, layered gabbro, and interlayered cumulate ultramafic rocks (wehrlite) (Dungan, 1974, p. 46-53). Includes some metatonalite and gneissic amphibolite. Gabbros are generally partially altered to albite, actinolite, epidote, and chlorite. Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Foam Creek stock Enumerated_Domain_Value_Definition: Foam Creek stock (Late Cretaceous)ﾑMedium-grained biotite metagranodiorite with distinctive decussate biotite books. CI=10-15, rarely 25 (Ford and others, 1988, p. 17). Hypidiomorphic granular with faint relict oscillatory zoned oligoclase-andesine. Commonly retrogressively altered. Margins are highly gneissic Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Gamma Ridge Vols. Enumerated_Domain_Value_Definition: Volcanic rocks of Gamma Ridge (Pliocene): Volcanic rocksﾑAltered tuff, volcanic breccia, volcanic sandstone, welded tuff, and minor flows of basalt. Variegated red, brown, green, and white; bedding obscure; altered to carbonate minerals, sericite, clays, and chlorite; siliceous kaolinite common near Gamma Peak; glassy rocks commonly spherulitic; common veins of zeolites, carbonate minerals, and quartz. Before alteration, composition ranged from rhyolite to basalt Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Granite Falls stock Enumerated_Domain_Value_Definition: Granite Falls stock and associated plutons (middle Eocene)ﾑBiotite hornblende granodiorite, mostly fine grained hypidiomorphic granular, slightly porphyritic. Locally contains hypersthene and small amounts of elbaite (tourmaline). Commonly highly altered. Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Grotto:DeadDuck stoc Enumerated_Domain_Value_Definition: Grotto batholith (Oligocene): Dead Duck plutonﾑHornblende-biotite tonalite and granodiorite, with minor augite and hypersthene Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Grotto:MonteCristo s Enumerated_Domain_Value_Definition: Grotto batholith (Oligocene): Monte Cristo stockﾑHornblende-biotite granodiorite and tonalite. Locally contains augite and hypersthene. Commonly somewhat altered to chlorite, epidote, and sphene Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value:Hanson Lk. vols. Enumerated_Domain_Value_Definition: Rhyolite of Hanson Lake (middle Eocene)ﾑDark-colored, glassy to devitrified biotite rhyolite ash-flow tuff. Commonly perlitic, contains sanidine, plagioclase, quartz, and garnet phenocrysts. Poorly exposed near Hanson Lake and to the west where the unit includes quartz- and clinopyroxene-bearing mafic tuff. Northwest of Bosworth Lake, mafic tuff and breccia are highly altered to epidote and smectites Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: HHM Enumerated_Domain_Value_Definition: Helena-Haystack m四ange (middle Eocene to Late Cretaceous): Greenstone, foliated greenstone, and greenschistﾑGreenstone including basalt with relict clinopyroxene and plagioclase to well-recrystallized actinolitic greenstone, and greenschist, commonly with pumpellyite, prehnite, stilpnomelane, and locally with aragonite in veins. Cruver (1983, p. 23) reports lawsonite in metagraywacke associated with greenstone of his Haystack Mountain unit on strike to the northwest. Outcrops are commonly massive, but on Big and Little Deer Peaks, probable bedding is revealed by broad color bands and contrasting joint patterns when viewed from afar; Diabase and gabbroﾑUralitic metadiabase and metagabbro, rarely with relict brown hornblende and saussuritic plagioclase, and very rare relict clinopyroxene. Partially to completely altered to actinolite and pumpellyite with pseudomorphous ophitic or subophitic textures. Commonly cut by mylonitic to cataclastic microshears. Commonly weathers out of serpentinite matrix as steepsided hillocks: Foliated metavolcanic rocksﾑSilicic metaporphyry and micaceous quartz-feldspar schist, commonly with relict plagioclase phenoclasts. Foliated light-colored greenstone and greenstone. On Helena Ridge, includes considerable foliated greenstone, some with relict pillows. Northwest of Darrington, includes considerable metabasalt with relict plagioclase and clinopyroxene in an altered felty or trachytic matrix; AmphiboliteﾑFine-grained amphibolite with well-crystallized green hornblende and plagioclase, partially altered to chlorite, epidote, and pumpellyite(?); and TonaliteﾑMedium･grained hypidiomorphic hornblende tonalite altered to chlorite, prehnite, epidote, and pumpellyite(?). Rocks are locally gneissic and cataclastic, interlayered with amphibolite (TKha) at north contact of tonalite Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Hidden Lake stock Enumerated_Domain_Value_Definition: Hidden Lake stock (middle Eocene to Late Cretaceous)ﾑBiotite metatonalite, based on modes, but rocks are granodiorite based on CIPW norms and d 18O values greater than 10 (Ford and others, 1988, p.26; White and others, 1988, p. 30). Relict hypidiomorphic granular texture with plagioclase mostly filled with well-crystallized epidote and muscovite; some crushed grain margins have recrystallized, and quartz is sutured. Some K-feldspar is microcline. Rocks are massive and sharply intrusive Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Jordan Lks. pluton Enumerated_Domain_Value_Definition: Jordan Lakes pluton (Late Cretaceous)ﾑMedium-grained hornblende-biotite tonalite and granodiorite. Hypidiomorphic granular with euhedral to subhedral plagioclase with relict euhedral oscillatory zoning and locally filled with clinozoisite and muscovite and in a mesostasis of microcline or perthite. Myrmekite common. CI=5-21, generally 10-17 Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Magic Mtn. Gneiss Enumerated_Domain_Value_Definition: Magic Mountain Gneiss (Tertiary and Late Cretaceous)ﾑLight-colored chlorite-muscovite-epidote-plagioclase gneiss or flaser gneiss interlayered with chlorite-epidote-quartz-albite schist, locally with garnet and hornblende. Plagioclase, strikingly filled with epidote, is mostly albite and oligoclase; epidote is strongly zoned, mostly to iron-rich rims; chlorite is typically Mg rich. The gneiss layers range from flaseroid with epidote-filled plagioclase insets in a blastomylonitic quartz matrix to strongly layered quartz and albite rocks with numerous stringers of epidote and chlorite. Gneiss layers and greenschist layers are most commonly separated, but gradations occur. Scale of layering ranges from 5 cm to 6 m, but near the contact with the Cascade River Schist, greenschist layers increase in thickness and may be as thick as 60 m. Locally this contact is marked by a monolithologic breccia of equidimensional light-colored gneiss clasts, commonly augen shaped and as large as10 cm in a greenschist matrix. Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Mount Pilchuck stock Enumerated_Domain_Value_Definition: Mount Pilchuck stock (middle Eocene): Granite and granodioriteﾑMostly fine grained, slightly porphyritic, hypidiomorphic granular biotite granite with resorbed quartz phenocrysts. CI=4-8, locally as much as 40 percent K-feldspar, mostly perthite (Wiebe, 1963, p. 21). Wiebe (1963, p. 24-31) describes accessory cordierite and one occurrence of garnet. Zircon and tourmaline (elbaite) are also common accessories. Rock is massive, has chilled margins, and has thermally metamorphosed the country rock Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Mt Buckindy pluton Enumerated_Domain_Value_Definition: Mount Buckindy pluton (Miocene): Tonalite and granodioriteﾑMostly porphyritic biotite-hornblende tonalite to hornblende tonalite porphyry. Rocks are quartz-phyric with hypidiomorphic granular groundmass, but heterogeneous in grain size and texture. Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Sauk Ring dike Enumerated_Domain_Value_Definition: Sauk ring dike (Oligocene and (or) middle Eocene)ﾑGray dacite and andesite porphyry with abundant plagioclase and rare quartz phenocrysts; highly altered to epidote, chlorite, sericite, albite, and carbonate minerals. A t northwest base of Sheep Mountain, rocks are a mixture of holocrystalline hornblende tonalite, dacite, and porphyry, as well as gradational types in between Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Sloan Cr. plutons Enumerated_Domain_Value_Definition: Sloan Creek plutons (Late Cretaceous)ﾑBiotite-hornblende tonalitic gneiss, flaser gneiss, and local gneissic metatonalite; medium grained, homogeneous, crystalloblastic gneissose to strongly flaseroid; locally strongly mylonitic. CI=0-37, but for most rocks CI=20-30 (Ford and others, 1988, p. 71). Locally contains garnet. Plagioclase normally zoned or unzoned and strongly stress twinned but with relict patchy zoning and faint oscillatory zoning and synneusis twins (Heath, 1971, p. 62). Retrogressive alteration is pronounced but somewhat sporadic; epidote minerals and sericite commonly fill plagioclase cores; mafic minerals are altered to chlorite, sphene, and prehnite. As mapped, includes some interlayered flaser gneiss and Nason Ridge Migmatitic Gneiss (Kng) Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Squire Cr. stock Enumerated_Domain_Value_Definition: Squire Creek stock and related intrusive rocks (Oligocene): TonaliteﾑPredominantly uniform hornblende-biotite tonalite and granodiorite, medium-grained and hypidiomorphic granular. Locally rich in small hornblende diorite inclusions. CI=12-18 as reported in Vance (1957a, p. 241-274). Locally in interior, pluton is fine-grained and with lower CI; Biotite tonaliteﾑOn Vesper Peak mostly medium-grained hypidiomorphic inequigranular; rarely hornblende-biotite tonalite with rare hypersthene. CI=9-28, mostly about 12-20 (Baum, 1968, p. 20); Hornblende quartz dioriteﾑAt Granite Lake the rocks are a porphyritic hornblende-clinopyroxene quartz diorite with euhedral, highly corroded, pale-brown hornblende phenocrysts. Dikes of a similar but more porphyritic rock-type are common in the Mount Higgins area; and Tonalite of the Shake Creek stockﾑBiotite-hornblende tonalite, fine-grained, highly altered Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Sulphur Mtn. pluton Enumerated_Domain_Value_Definition: Sulphur Mountain pluton (Late Cretaceous): Metagranodiorite and metatonaliteﾑMedium-grained hornblende-biotite metagranodiorite and metatonalite characterized by large clinopyroxene prisms as long as 8 cm and quartz augen as large as 1.4 cm with accessory subhedral clinozoisite. Textures are xenoblastic to hypidiomorphic. Sphene and rare garnet and allanite. Calcic oligoclase commonly has faint euhedral oscillatory zoning but is also highly filled with epidote. CI=5-19, mostly about 10-13 Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Tenpeak pluton Enumerated_Domain_Value_Definition: Tenpeak pluton (Late Cretaceous): Metatonalite and tonalitic gneissﾑLight-colored medium-grained hornblende-biotite tonalite and tonalitic gneiss. Xenoblastic to hypidiomorphic, commonly with aligned euhedral hornblende prisms, locally as long as 1 cm. CI=15-20, locally as much as 40. Subhedral epidote and pseudomyrmekitic epidote common. Allanite and garnet occur on west margin of unit. Hornblende commonly zoned from brownish green to bluish green on rims. Sodic andesine crystals commonly broken and with faint euhedral oscillatory zoning. Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Tonalite of Bench Lk Enumerated_Domain_Value_Definition: Tonalitic gneiss of Bench Lake (Late Cretaceous)ﾑMostly light colored, fine grained heterogeneous biotite tonalitic gneiss, locally with hornblende. Subhedral clinozoicite associated with mafic minerals. CI=3-19, mostly about 9･ 12. Layers and pods of finer grained biotite gneiss, garnet biotite-hornblende schist, and amphibolite locally making up 5-10 percent of rock. Mafic schlieren may be swirled. Cut by light-colored tonalite, pegmatite, and aplite dikes. Contact with unit Kblg is gradational. Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Trafton Enumerated_Domain_Value_Definition: Trafton terrane of Whetten and others (1988) (middle Eocene to Late Cretaceous)ﾑPredominantly greenstone and banded chert with subordinate graywacke and argillite. Commonly highly sheared and mixed on all scales. Greenstone has relict plagioclase and clinopyroxene, but is now mostly chlorite, carbonate minerals, and brownish pumpellyite(?); some rocks with veins of green pumpellyite. Chert is red and black, locally highly recrystallized. Minor diabase. Argillite locally phyllitic; Marble and limestoneﾑSimilar to unit TKwm. Locally highly fossiliferous bioclastic limestone such as at the abandoned Morcrop quarry on the north side of Porter Creek Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: WMB Enumerated_Domain_Value_Definition: Rocks of the western melange belt (middle Eocene to Late Cretaceous): Semischist, slate, and phylliteﾑMostly pervasively foliated gray to black lithofeldspathic and volcanolithic subquartzose sandstone and semischist. Locally abundant fine- to medium-cobble conglomerate. Commonly interbedded with argillite or phyllite. Locally well developed rhythmite. Where foliation is less well developed, sedimentary features, including graded beds and load casts, are locally well preserved. Metamorphic minerals, which locally replace matrix and framework grains and also occur in veins, are carbonate minerals, prehnite, pumpellyite, chlorite, and sericite. Unit includes rare greenstone derived from mafic volcanic breccia, tuff, and flows. Also includes locally abundant chert; PhylliteﾑGray, brown t o black phyllite, less abundant semischist, locally abundant chert and rare greenstone. Includes subordinate thin beds of recrystallized sandstone and semischist and rare stretched-pebble conglomerate. Locally with well-developed pencil structures and rarer crinkle lineation . Metamorphic minerals are sericite, carbonate minerals, chlorite, prehnite, and pumpellyite(?). Metasandstone commonly forms small boudins as long as a few meters; Marble and limestoneﾑMostly coarsely crystalline, dark-gray to white marble in small to moderate-size pods. 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Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Whole numbers that are automatically generated. Attribute: Attribute_Label: RPOLY# Attribute_Definition: Internal node number for the right polygon. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Whole numbers that are automatically generated. Attribute: Attribute_Label: LENGTH Attribute_Definition: Length of feature in internal units. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Positive real numbers that are automatically generated. Attribute: Attribute_Label: SRCLEAVAGE# Attribute_Definition: Internal feature number. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Sequential unique whole numbers that are automatically generated. Attribute: Attribute_Label: SRCLEAVAGE-ID Attribute_Definition: User-defined feature number. Attribute_Definition_Source: ESRI Attribute: Attribute_Label: LTYPE Attribute_Definition: geologic contact description Attribute_Definition_Source: Author Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: scratch boundary, certain Enumerated_Domain_Value_Definition: polygon boundary that does not plot. Detailed_Description: Entity_Type: Entity_Type_Label: srcleavage.pat Attribute: Attribute_Label: FID Attribute_Definition: Internal feature number. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Sequential unique whole numbers that are automatically generated. Attribute: Attribute_Label: Shape Attribute_Definition: Feature geometry. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Coordinates defining the features. Attribute: Attribute_Label: AREA Attribute_Definition: Area of feature in internal units squared. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Positive real numbers that are automatically generated. Attribute: Attribute_Label: PERIMETER Attribute_Definition: Perimeter of feature in internal units. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Positive real numbers that are automatically generated. Attribute: Attribute_Label: SRCLEAVAGE# Attribute_Definition: Internal feature number. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Sequential unique whole numbers that are automatically generated. Attribute: Attribute_Label: SRCLEAVAGE-ID Attribute_Definition: User-defined feature number. Attribute_Definition_Source: ESRI Attribute: Attribute_Label: PTYPE Attribute_Definition: symbol of geologic unit Attribute_Definition_Source: Author Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: ph Enumerated_Domain_Value_Definition: Area of well-developed foliation in rocks of eastern and western melange belts Enumerated_Domain: Enumerated_Domain_Value: o Enumerated_Domain_Value_Definition: Isolated area of no foliation. Spatial_Data_Organization_Information: srdikes Direct_Spatial_Reference_Method: Vector Point_and_Vector_Object_Information: SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: Complete chain Point_and_Vector_Object_Count: 3 SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: Label point Point_and_Vector_Object_Count: 3 SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: GT-polygon composed of chains Point_and_Vector_Object_Count: 3 SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: Point Point_and_Vector_Object_Count: 2 8 Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Planar: Map_Projection: Map_Projection_Name: Transverse Mercator Transverse_Mercator: Scale_Factor_at_Central_Meridian: 0.999600 Longitude_of_Central_Meridian: -123.000000 Latitude_of_Projection_Origin: 0.000000 False_Easting: 500000.000000 False_Northing: 0.000000 Planar_Coordinate_Information: Planar_Coordinate_Encoding_Method: coordinate pair Coordinate_Representation: Abscissa_Resolution: 0.000008 Ordinate_Resolution: 0.000008 Planar_Distance_Units: meters Geodetic_Model: Horizontal_Datum_Name: D_Clarke_1866 Ellipsoid_Name: Clarke 1866 Semi-major_Axis: 6378206.400000 Denominator_of_Flattening_Ratio: 294.978698 Entity_and_Attribute_Information: Detailed_Description: Entity_Type: Entity_Type_Label: srdikes.aat Attribute: Attribute_Label: FID Attribute_Definition: Internal feature number. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Sequential unique whole numbers that are automatically generated. Attribute: Attribute_Label: Shape Attribute_Definition: Feature geometry. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Coordinates defining the features. Attribute: Attribute_Label: FNODE# Attribute_Definition: Internal node number for the beginning of an arc (from-node). Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Whole numbers that are automatically generated. Attribute: Attribute_Label: TNODE# Attribute_Definition: Internal node number for the end of an arc (to-node). Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Whole numbers that are automatically generated. Attribute: Attribute_Label: LPOLY# Attribute_Definition: Internal node number for the left polygon. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Whole numbers that are automatically generated. Attribute: Attribute_Label: RPOLY# Attribute_Definition: Internal node number for the right polygon. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Whole numbers that are automatically generated. Attribute: Attribute_Label: LENGTH Attribute_Definition: Length of feature in internal units. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Positive real numbers that are automatically generated. Attribute: Attribute_Label: SRDIKES# Attribute_Definition: Internal feature number. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Sequential unique whole numbers that are automatically generated. Attribute: Attribute_Label: SRDIKES-ID Attribute_Definition: User-defined feature number. Attribute_Definition_Source: ESRI Attribute: Attribute_Label: LTYPE Attribute_Definition: geologic contact description Attribute_Definition_Source: Author Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: scratch boundary, certain Enumerated_Domain_Value_Definition: polygon boundary that does not plot. Detailed_Description: Entity_Type: Entity_Type_Label: srdikes.pat Attribute: Attribute_Label: FID Attribute_Definition: Internal feature number. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Sequential unique whole numbers that are automatically generated. Attribute: Attribute_Label: Shape Attribute_Definition: Feature geometry. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Coordinates defining the features. Attribute: Attribute_Label: AREA Attribute_Definition: Area of feature in internal units squared. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Positive real numbers that are automatically generated. Attribute: Attribute_Label: PERIMETER Attribute_Definition: Perimeter of feature in internal units. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Positive real numbers that are automatically generated. Attribute: Attribute_Label: SRDIKES# Attribute_Definition: Internal feature number. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Sequential unique whole numbers that are automatically generated. Attribute: Attribute_Label: SRDIKES-ID Attribute_Definition: User-defined feature number. Attribute_Definition_Source: ESRI Attribute: Attribute_Label: PTYPE Attribute_Definition: symbol of geologic unit Attribute_Definition_Source: Author Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Tpd Enumerated_Domain_Value_Definition: Mount Pilchuck stock: Dike swarmﾑConcentration of granite and granite porphyry dikes making up as much as 50 percent of unit TKwg rock ground. May include numerous dikes and sills associated with the Bald Mountain pluton Enumerated_Domain: Enumerated_Domain_Value: o Enumerated_Domain_Value_Definition: Isolated area of no dikes. Spatial_Data_Organization_Information: srstructure Direct_Spatial_Reference_Method: Vector Point_and_Vector_Object_Information: SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: Entity point Point_and_Vector_Object_Count: 2880 SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: Complete chain Point_and_Vector_Object_Count: 0 SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: Point Point_and_Vector_Object_Count: 2 8 SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: Label point Point_and_Vector_Object_Count: 2549 Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Planar: Map_Projection: Map_Projection_Name: Transverse Mercator Transverse_Mercator: Scale_Factor_at_Central_Meridian: 0.999600 Longitude_of_Central_Meridian: -123.000000 Latitude_of_Projection_Origin: 0.000000 False_Easting: 500000.000000 False_Northing: 0.000000 Planar_Coordinate_Information: Planar_Coordinate_Encoding_Method: coordinate pair Coordinate_Representation: Abscissa_Resolution: 0.000128 Ordinate_Resolution: 0.000128 Planar_Distance_Units: meters Geodetic_Model: Horizontal_Datum_Name: D_Clarke_1866 Ellipsoid_Name: Clarke 1866 Semi-major_Axis: 6378206.400000 Denominator_of_Flattening_Ratio: 294.978698 Entity_and_Attribute_Information: Detailed_Description: Entity_Type: Entity_Type_Label: srstruct.pat Attribute: Attribute_Label: FID Attribute_Definition: Internal feature number. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Sequential unique whole numbers that are automatically generated. Attribute: Attribute_Label: Shape Attribute_Definition: Feature geometry. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Coordinates defining the features. Attribute: Attribute_Label: AREA Attribute_Definition: Area of feature in internal units squared. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Area is always zero for point coverages. Values are automatically generated. Attribute: Attribute_Label: PERIMETER Attribute_Definition: Perimeter of feature in internal units. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Perimeter is always zero for point coverages. Values are automatically generated. Attribute: Attribute_Label: SRSTRUCT# Attribute_Definition: Internal feature number. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Sequential unique whole numbers that are automatically generated. Attribute: Attribute_Label: SRSTRUCT-ID Attribute_Definition: User-defined feature number. Attribute_Definition_Source: ESRI Attribute: Attribute_Label: PTTYPE Attribute_Definition: strike and dip of planar structures and bearing and plunge of linear structures Attribute_Definition_Source: Author Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: _l_lineation_i_ Enumerated_Domain_Value_Definition: inclined lineation Enumerated_Domain: Enumerated_Domain_Value: bedding w/tops Enumerated_Domain_Value_Definition: strike and dip of bedding; top direction known Enumerated_Domain: Enumerated_Domain_Value: bedding Enumerated_Domain_Value_Definition: strike and dip of bedding; top direction unknown Enumerated_Domain: Enumerated_Domain_Value: horizontal lineation Enumerated_Domain_Value_Definition: strike of lineation Enumerated_Domain: Enumerated_Domain_Value: foliation Enumerated_Domain_Value_Definition: strike and dip of aligned planar minerals in metamorphic rocks Enumerated_Domain: Enumerated_Domain_Value: fault_ball Enumerated_Domain_Value_Definition: position of ball symbol showing downthrown side of high-angle fault Enumerated_Domain: Enumerated_Domain_Value: vert foliation and bedding OK Enumerated_Domain_Value_Definition: strike of vertical foliation and parallel bedding: top direction unknown Enumerated_Domain: Enumerated_Domain_Value: ot bedding w/tops OK Enumerated_Domain_Value_Definition: strike and dip of overturned bedding; original top direction known Enumerated_Domain: Enumerated_Domain_Value: vert bedding OK Enumerated_Domain_Value_Definition: Vertical bedding; top direction unknown Enumerated_Domain: Enumerated_Domain_Value: vert bedding w/tops OK Enumerated_Domain_Value_Definition: vertical bedding; top direction known Attribute: Attribute_Label: DIP Attribute_Definition: Dip of planar structure (angle of plane to horizontal) or plunge of lineation (angle of lineation to horizontal) Attribute_Definition_Source: Author Attribute_Domain_Values: Attribute: Attribute_Label: STRIKE Attribute_Definition: Strike of planar structure (azimuth of horizontal line on plane) or azimuth of linear structure Spatial_Data_Organization_Information: srrocksamp Direct_Spatial_Reference_Method: Vector Point_and_Vector_Object_Information: SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: Entity point Point_and_Vector_Object_Count: 722 SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: Point Point_and_Vector_Object_Count: 4 9 Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Planar: Map_Projection: Map_Projection_Name: Transverse Mercator Transverse_Mercator: Scale_Factor_at_Central_Meridian: 0.999600 Longitude_of_Central_Meridian: -123.000000 Latitude_of_Projection_Origin: 0.000000 False_Easting: 500000.000000 False_Northing: 0.000000 Planar_Coordinate_Information: Planar_Coordinate_Encoding_Method: coordinate pair Coordinate_Representation: Abscissa_Resolution: 0.000128 Ordinate_Resolution: 0.000128 Planar_Distance_Units: meters Geodetic_Model: Horizontal_Datum_Name: D_Clarke_1866 Ellipsoid_Name: Clarke 1866 Semi-major_Axis: 6378206.400000 Denominator_of_Flattening_Ratio: 294.978698 Entity_and_Attribute_Information: Detailed_Description: Entity_Type: Entity_Type_Label: srrocksamp.pat Attribute: Attribute_Label: FID Attribute_Definition: Internal feature number. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Sequential unique whole numbers that are automatically generated. Attribute: Attribute_Label: Shape Attribute_Definition: Feature geometry. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Coordinates defining the features. Attribute: Attribute_Label: AREA Attribute_Definition: Area of feature in internal units squared. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Area is always zero for point coverages. Values are automatically generated. Attribute: Attribute_Label: PERIMETER Attribute_Definition: Perimeter of feature in internal units. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Perimeter is always zero for point coverages. Values are automatically generated. Attribute: Attribute_Label:SRROCKSAMP# Attribute_Definition: Internal feature number. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Sequential unique whole numbers that are automatically generated. Attribute: Attribute_Label: SRROCKSAMP-ID Attribute_Definition: User-defined feature number. Attribute_Definition_Source: ESRI Attribute: Attribute_Label: PTTYPE Attribute_Definition: archival category Attribute_Definition_Source: Author Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: archival Enumerated_Domain_Value_Definition: most representative sample or unusual specimen in easily retrieved archive, North Cascades National Park, Marblemount, WA Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: store Enumerated_Domain_Value_Definition: sample in boxed storage, North Cascades National Park, Marblemount, WA Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: combine Enumerated_Domain_Value_Definition:multiple samples from same collection site in archive, store, and sent to other researcher catagories Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: bm Enumerated_Domain_Value_Definition: sample sent to Professor Robert Miller at San Jose State University, San Jose, CA Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: jd Enumerated_Domain_Value_Definition: sample sent to Joe Dragovich at Washington Department of Natural Resources, Division of Geology and Earth Resources Attribute_Label: SAMPNO Attribute_Definition: Field number of sample Attribute_Definition_Source: Author Attribute: Attribute_Label: SEL Attribute_Definition: number indicating category (archival or store, etc.) and existence of thin section for sample Attribute_Definition_Source: Author Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 0 Enumerated_Domain_Value_Definition: existence of thin section unknown Enumerated_Domain: Enumerated_Domain_Value: 1 Enumerated_Domain_Value_Definition: archival sample, no thin section Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 2 Enumerated_Domain_Value_Definition: archival sample with thin section Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 3 Enumerated_Domain_Value_Definition: stored sample without thin section Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 4 Enumerated_Domain_Value_Definition: stored sample with thin section Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 6 Enumerated_Domain_Value_Definition: multiple samples at collection site. Some may have thin sections (see description field below) Attribute: Attribute_Label: DESCRIPTION Attribute_Definition: additional information about sample, includes, comments on lithology, age, references, etc. For ﾒcombineﾓ samples, identifies those with thin sections Attribute_Definition_Source: Author Attribute: Attribute_Label: UNIT Attribute_Definition: Source unit of sample Attribute_Definition_Source: Author Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Bald Mountain pluton Enumerated_Domain_Value_Definition: Bald Mountain pluton (age uncertain): Granodiorite and granite; number of samples of this unit = 9; for description see downloadable pdf of Description of Map Units: http://pubs.usgs.gov/imap/i2592/ Enumerated_Domain: Enumerated_Domain_Value: Barlow Pass Volcanic Rocks: sed. rock Enumerated_Domain_Value_Definition: Barlow Pass Volcanics of Vance (1957a, b): Sandstone; number of samples of this unit = 27; for description see downloadable pdf of Description of Map Units: http://pubs.usgs.gov/imap/i2592/ Enumerated_Domain: Enumerated_Domain_Value: Barlow Pass Volcanic Rocks: vol. rock Enumerated_Domain_Value_Definition: Barlow Pass Volcanics of Vance (1957a, b): Volcanic rocks; number of samples of this unit = 14; for description see downloadable pdf of Description of Map Units: http://pubs.usgs.gov/imap/i2592/ Enumerated_Domain: Enumerated_Domain_Value: Bell Pass melange: Vedder Complex Enumerated_Domain_Value_Definition: Bell Pass melange: Vedder Complex; number of samples of this unit = 5; for description see downloadable pdf of Description of Map Units: http://pubs.usgs.gov/imap/i2592/ Enumerated_Domain: Enumerated_Domain_Value: Bell Pass melange: Yellow Aster Cmplx Enumerated_Domain_Value_Definition: Bell Pass melange: Yellow Aster Complex of Misch (1966); number of samples of this unit = 9; for description see downloadable pdf of Description of Map Units: http://pubs.usgs.gov/imap/i2592/ Enumerated_Domain: Enumerated_Domain_Value: Bell Pass melange; ultramafite Enumerated_Domain_Value_Definition: Bell Pass melange (Early Cretaceous and Late Jurassic): Yellow Aster Complex of Misch (1966): Ultramafic rock; number of samples of this unit = 1; for description see downloadable pdf of Description of Map Units: http://pubs.usgs.gov/imap/i2592/ Enumerated_Domain: Enumerated_Domain_Value: Bench Lk.; Banded tonalitic gneiss Enumerated_Domain_Value_Definition: Tonalitic gneiss of Bench Lake: Banded tonalitic gneiss; number of samples of this unit = 35; for description see downloadable pdf of Description of Map Units: http://pubs.usgs.gov/imap/i2592/ Enumerated_Domain: Enumerated_Domain_Value: Breccia of Round Lake Enumerated_Domain_Value_Definition: Breccia of Round Lake; number of samples of this unit = 4; for description see downloadable pdf of Description of Map Units: http://pubs.usgs.gov/imap/i2592/ Enumerated_Domain: Enumerated_Domain_Value: Cascade Pass dike Enumerated_Domain_Value_Definition: Cascade Pass dike: Tonalite; number of samples of this unit = 11; for description see downloadable pdf of Description of Map Units: http://pubs.usgs.gov/imap/i2592/ Enumerated_Domain: Enumerated_Domain_Value: Cascade River Schist Enumerated_Domain_Value_Definition: Cascade River Schist; number of samples of this unit = 98; for description see downloadable pdf of Description of Map Units: http://pubs.usgs.gov/imap/i2592/ Enumerated_Domain: Enumerated_Domain_Value: Chaval pluton Enumerated_Domain_Value_Definition: Chaval pluton; number of samples of this unit = 7; for description see downloadable pdf of Description of Map Units: http://pubs.usgs.gov/imap/i2592/ Enumerated_Domain: Enumerated_Domain_Value: Chilliwack Group Enumerated_Domain_Value_Definition: Chilliwack Group of Cairnes ( 1 9 4 4 ); number of samples of this unit = 24; for description see downloadable pdf of Description of Map Units: http://pubs.usgs.gov/imap/i2592/ Enumerated_Domain: Enumerated_Domain_Value: Chilliwack Group: volcanic rocks Enumerated_Domain_Value_Definition: Chilliwack Group of Cairnes (1944): Volcanic and metavolcanic rocks; number of samples of this unit = 6; for description see downloadable pdf of Description of Map Units: http://pubs.usgs.gov/imap/i2592/ Enumerated_Domain: Enumerated_Domain_Value: Chiwaukum Schist Enumerated_Domain_Value_Definition: Chiwaukum Schist; number of samples of this unit = 32; for description see downloadable pdf of Description of Map Units: http://pubs.usgs.gov/imap/i2592/ Enumerated_Domain: Enumerated_Domain_Value: Cloudy Pass batholith and assoc. rocks Enumerated_Domain_Value_Definition: Cloudy Pass batholith and associated rocks; number of samples of this unit = 22; for description see downloadable pdf of Description of Map Units: http://pubs.usgs.gov/imap/i2592/ Enumerated_Domain: Enumerated_Domain_Value: Cool Glacier stock Enumerated_Domain_Value_Definition: Cool Glacier stock; number of samples of this unit = 1; for description see downloadable pdf of Description of Map Units: http://pubs.usgs.gov/imap/i2592/ Enumerated_Domain: Enumerated_Domain_Value: Cyclone Lake pluton Enumerated_Domain_Value_Definition: Cyclone Lake pluton; number of samples of this unit = 7; for description see downloadable pdf of Description of Map Units: http://pubs.usgs.gov/imap/i2592/ Enumerated_Domain: Enumerated_Domain_Value: Darrington Phyllite Enumerated_Domain_Value_Definition: Easton Metamorphic Suite: Darrington Phyllite; number of samples of this unit = 21; for description see downloadable pdf of Description of Map Units: http://pubs.usgs.gov/imap/i2592/ Enumerated_Domain: Enumerated_Domain_Value: Downey Creek sill complex Enumerated_Domain_Value_Definition: Downey Creek sill complex; number of samples of this unit = 10; for description see downloadable pdf of Description of Map Units: http://pubs.usgs.gov/imap/i2592/ Enumerated_Domain: Enumerated_Domain_Value: Downey Mountain stock Enumerated_Domain_Value_Definition: Downey Mountain stock; number of samples of this unit = 1; for description see downloadable pdf of Description of Map Units: http://pubs.usgs.gov/imap/i2592/ Enumerated_Domain: Enumerated_Domain_Value: EMB; Trafton Enumerated_Domain_Value_Definition: Trafton terrane of Whetten and others (1988); number of samples of this unit = 17; for description see downloadable pdf of Description of Map Units: http://pubs.usgs.gov/imap/i2592/ Enumerated_Domain: Enumerated_Domain_Value: Eastern melange belt Enumerated_Domain_Value_Definition: Rocks of the eastern melange belt; number of samples of this unit = 46; for description see downloadable pdf of Description of Map Units: http://pubs.usgs.gov/imap/i2592/ Enumerated_Domain: Enumerated_Domain_Value: Eldorado orthogneiss Enumerated_Domain_Value_Definition: Eldorado Orthogneiss; number of samples of this unit = 5; for description see downloadable pdf of Description of Map Units: http://pubs.usgs.gov/imap/i2592/ Enumerated_Domain: Enumerated_Domain_Value: Eldorado orthogneiss: flaser gneiss Enumerated_Domain_Value_Definition: Eldorado Orthogneiss: flaser gneiss; number of samples of this unit = 6; for description see downloadable pdf of Description of Map Units: http://pubs.usgs.gov/imap/i2592/ Enumerated_Domain: Enumerated_Domain_Value: Foam Creek stock Enumerated_Domain_Value_Definition: Foam Creek stock; number of samples of this unit = 2; for description see downloadable pdf of Description of Map Units: http://pubs.usgs.gov/imap/i2592/ Enumerated_Domain: Enumerated_Domain_Value: Granite Falls stock Enumerated_Domain_Value_Definition: Granite Falls stock; number of samples of this unit = 2; for description see downloadable pdf of Description of Map Units: http://pubs.usgs.gov/imap/i2592/ Enumerated_Domain: Enumerated_Domain_Value: Grassy Point stock Enumerated_Domain_Value_Definition: Grassy Point stock; number of samples of this unit = 2; for description see downloadable pdf of Description of Map Units: http://pubs.usgs.gov/imap/i2592/ Enumerated_Domain: Enumerated_Domain_Value: HH melange Enumerated_Domain_Value_Definition: Helena-Haystack m四ange: Peridotite and serpentinite matrix, Greenstone, foliated greenstone, and greenschist, Diabase and gabbro, Sedimentary rocks, Amphibolite, Tonalite; number of samples of this unit = 70; for description see downloadable pdf of Description of Map Units: http://pubs.usgs.gov/imap/i2592/ Enumerated_Domain: Enumerated_Domain_Value: Hardtack Lake pluton: metadiorite Enumerated_Domain_Value_Definition: Metadiorite; number of samples of this unit = 2; for description see downloadable pdf of Description of Map Units: http://pubs.usgs.gov/imap/i2592/ Enumerated_Domain: Enumerated_Domain_Value: Hidden Lake Stock Enumerated_Domain_Value_Definition: Hidden Lake stock; number of samples of this unit = 1; for description see downloadable pdf of Description of Map Units: http://pubs.usgs.gov/imap/i2592/ Enumerated_Domain: Enumerated_Domain_Value: Jorden Lakes pluton Enumerated_Domain_Value_Definition: Jorden Lakes pluton; number of samples of this unit = 9; for description see downloadable pdf of Description of Map Units: http://pubs.usgs.gov/imap/i2592/ Enumerated_Domain: Enumerated_Domain_Value: Magic Mountain Gneiss Enumerated_Domain_Value_Definition: Magic Mountain Gneiss; number of samples of this unit = 48; for description see downloadable pdf of Description of Map Units: http://pubs.usgs.gov/imap/i2592/ Enumerated_Domain: Enumerated_Domain_Value: Marblemount pluton Enumerated_Domain_Value_Definition: Marblemount pluton; number of samples of this unit = 32; for description see downloadable pdf of Description of Map Units: http://pubs.usgs.gov/imap/i2592/ Enumerated_Domain: Enumerated_Domain_Value: Marblemount pluton:flaser gn. border Enumerated_Domain_Value_Definition: Marblemount pluton: Flaser gneiss; number of samples of this unit = 2; for description see downloadable pdf of Description of Map Units: http://pubs.usgs.gov/imap/i2592/ Enumerated_Domain: Enumerated_Domain_Value: Metatonalite and metagabbro intrusions Enumerated_Domain_Value_Definition: Gabbroic intrusions; number of samples of this unit = 10; for description see downloadable pdf of Description of Map Units: http://pubs.usgs.gov/imap/i2592/ Enumerated_Domain: Enumerated_Domain_Value: Mount Buckindy pluton Enumerated_Domain_Value_Definition: Mount Buckindy pluton; number of samples of this unit = 4; for description see downloadable pdf of Description of Map Units: http://pubs.usgs.gov/imap/i2592/ Enumerated_Domain: Enumerated_Domain_Value: Napeequa Schist Enumerated_Domain_Value_Definition: Napeequa Schist; number of samples of this unit = 86; for description see downloadable pdf of Description of Map Units: http://pubs.usgs.gov/imap/i2592/ Enumerated_Domain: Enumerated_Domain_Value: Nason Ridge Migmatitic Gneiss Enumerated_Domain_Value_Definition: Nason Ridge Migmatitic Gneiss; number of samples of this unit = 10; for description see downloadable pdf of Description of Map Units: http://pubs.usgs.gov/imap/i2592/ Enumerated_Domain: Enumerated_Domain_Value: Older sandstone and conglomerate Enumerated_Domain_Value_Definition: Sandstone associated with the Straight Creek Fault; number of samples of this unit = 2; for description see downloadable pdf of Description of Map Units: http://pubs.usgs.gov/imap/i2592/ Enumerated_Domain: Enumerated_Domain_Value: Pilchuck stock Enumerated_Domain_Value_Definition: Mount Pilchuck stock; number of samples of this unit = 3; for description see downloadable pdf of Description of Map Units: http://pubs.usgs.gov/imap/i2592/ Enumerated_Domain: Enumerated_Domain_Value: Rhyolite of Hanson Lake Enumerated_Domain_Value_Definition: Rhyolite of Hanson Lake; number of samples of this unit = 8; for description see downloadable pdf of Description of Map Units: http://pubs.usgs.gov/imap/i2592/ Enumerated_Domain: Enumerated_Domain_Value: Rocks of Glacier Peak Volcano Enumerated_Domain_Value_Definition: Rocks of Glacier Peak volcano and associated volcanic rocks and deposits: Dacite (Holocene and (or) Pleistocene)ﾑMostly clinopyroxene-hypersthene dacite. Forms flows and volcanic rubble on Glacier Peak volcano; number of samples of this unit = 1; for description see downloadable pdf of Description of Map Units: http://pubs.usgs.gov/imap/i2592/ Enumerated_Domain: Enumerated_Domain_Value: Sauk Ring Dike Enumerated_Domain_Value_Definition: Sauk Ring dike; number of samples of this unit = 2; for description see downloadable pdf of Description of Map Units: http://pubs.usgs.gov/imap/i2592/ Enumerated_Domain: Enumerated_Domain_Value: Shuksan Greenschist Enumerated_Domain_Value_Definition: Easton Metamorphic Suite: Shuksan Greenschist; number of samples of this unit = 33; for description see downloadable pdf of Description of Map Units: http://pubs.usgs.gov/imap/i2592/ Enumerated_Domain: Enumerated_Domain_Value: Shuksan: Garnet-amphibolite unit Enumerated_Domain_Value_Definition: Easton Metamorphic Suite: Garnet amphibolite; number of samples of this unit = 4; for description see downloadable pdf of Description of Map Units: http://pubs.usgs.gov/imap/i2592/ Enumerated_Domain: Enumerated_Domain_Value: Slate of Rinker Ridge Enumerated_Domain_Value_Definition: Slate of Rinker Ridge; number of samples of this unit = 10; for description see downloadable pdf of Description of Map Units: http://pubs.usgs.gov/imap/i2592/ Enumerated_Domain: Enumerated_Domain_Value: Sloan Creek plutons Enumerated_Domain_Value_Definition: Sloan Creek plutons; number of samples of this unit = 14; for description see downloadable pdf of Description of Map Units: http://pubs.usgs.gov/imap/i2592/ Enumerated_Domain: Enumerated_Domain_Value: Squire Creek stock and related intrusive Enumerated_Domain_Value_Definition: Squire Creek stock and related intrusive rocks; number of samples of this unit = 5; for description see downloadable pdf of Description of Map Units: http://pubs.usgs.gov/imap/i2592/ Enumerated_Domain: Enumerated_Domain_Value: Sulphur Mountain pluton Enumerated_Domain_Value_Definition: Sulphur Mountain pluton; number of samples of this unit = 16; for description see downloadable pdf of Description of Map Units: http://pubs.usgs.gov/imap/i2592/ Enumerated_Domain: Enumerated_Domain_Value: Sulphur Mountain pluton: flaser gneiss Enumerated_Domain_Value_Definition: Sulphur Mountain pluton: Flaser gneiss; number of samples of this unit = 1; for description see downloadable pdf of Description of Map Units: http://pubs.usgs.gov/imap/i2592/ Enumerated_Domain: Enumerated_Domain_Value: Ten Peak pluton Enumerated_Domain_Value_Definition: Ten Peak pluton; number of samples of this unit = 7; for description see downloadable pdf of Description of Map Units: http://pubs.usgs.gov/imap/i2592/ Enumerated_Domain: Enumerated_Domain_Value: Tonalitic gneiss of Bench Lake Enumerated_Domain_Value_Definition: Tonalitic gneiss of Bench Lake; number of samples of this unit = 8; for description see downloadable pdf of Description of Map Units: http://pubs.usgs.gov/imap/i2592/ Enumerated_Domain: Enumerated_Domain_Value: Vocanic rocks of Gamma Ridge Enumerated_Domain_Value_Definition: Vocanic rocks of Gamma Ridge: Altered andesite and dacite flowsﾑRed to black andesite and dacite, plagioclase-phyric, trachytic; much altered to calcite, chlorite, and zeolites; number of samples of this unit = 1; for description see downloadable pdf of Description of Map Units: http://pubs.usgs.gov/imap/i2592/ Enumerated_Domain: Enumerated_Domain_Value: WMB: metagabbro Enumerated_Domain_Value_Definition: Rocks of the western melange belt; Gabbro and diorite and Ultramafic rocks; number of samples of this unit = 3; for description see downloadable pdf of Description of Map Units: http://pubs.usgs.gov/imap/i2592/ Enumerated_Domain: Enumerated_Domain_Value: Western melange belt Enumerated_Domain_Value_Definition: Western melange belt; Semischist, slate, and phyllite; Phyllite, Volcanic rocks; Gabbro and diorite number of samples of this unit = 36; for description see downloadable pdf of Description of Map Units: http://pubs.usgs.gov/imap/i2592/ Attribute: Attribute_Label: COUNTY2 Attribute_Definition: County in Washington State where sample collected Attribute_Definition_Source: Author Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Chel Enumerated_Domain_Value_Definition: Chelan County Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Skag Enumerated_Domain_Value_Definition: Skagit County Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value:Snoh Enumerated_Domain_Value_Definition: Snohomish County Distribution_Information: Distributor: Contact_Information: Contact_Person_Primary: Contact_Person: Database Coordinator Contact_Organization: U.S. Geological Survey Contact_Address: Address_Type: mailing address Address: 345 Middlefield Rd., M/S 973 City: Menlo Park State_or_Province: CA Postal_Code: 94025 Country: USA Contact_Voice_Telephone: 650-329-4935 Contact_Facsimile_Telephone: 650-329-4936 Contact_Electronic_Mail_Address: kwheeler@usgs.gov Contact_Instructions: Resource_Description: USGS Miscellaneous Investigations Series I-2592 and USGS Data Series, DS-188 consists of both traditional geologic map products and ARC/INFO format geospatial databases. Furthermore, the traditional geologic map products (map sheets and pamphlets) can be obtained either as paper or as PDF files. Distribution_Liability: Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. Although this publication has been subjected to rigorous review and is substantially complete, the USGS reserves the right to revise the data pursuant to further analysis and review. Furthermore, it is released on condition that neither the USGS nor the United States Government may be held liable for any damages resulting from its authorized or unauthorized use. Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Format_Name: Sauk River geologic map as a PDF file Format_Specification:Adobe Acrobat Document Format_Information_Content: PDFs (2 files) of geologic map and cross sections, correlation chart, generalized geologic map, and maps of previous work and sources of data Transfer_Size: 12.52 MB Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: http://pubs.usgs.gov/imap/i2592/ Digital_Form: Digital_Transfer_Information: Format_Name: Sauk River geologic map as Encapsulated Postscript files Format_Specification: EPS file Format_Information_Content: 2 EPS files of geologic map and cross sections, correlation chart, generalized geologic map, and maps of previous work and sources of data Transfer_Size: 40.6 MB Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: http://pubs.usgs.gov/imap/i2592/ Digital_Form: Digital_Transfer_Information: Format_Name:accompanying pamphlet as a PDF file Format_Specification:Adobe Acrobat Document Format_Information_Content: Introduction, Acknowledgements, Summary of Geologic History, expanded description of rock units, tables, and reference list Transfer_Size: 1.2 MB Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: http://pubs.usgs.gov/imap/i2592/ Digital_Form: Digital_Transfer_Information: Format_Name: srcovers4.tar.gz Format_Version_Number: 1 Format_Version_Date: 2006 Format_Specification: ARC/INFO v. 7.1.1 Format_Information_Content: 7 ARC/INFO export (.e00) files. File_Decompression_Technique: TAR and gzip (see the readme for more information about TAR and gzip). Transfer_Size: 4 MB Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: http://pubs.usgs.gov/ds Fees: No fees for digital forms of the report. Ordering_Instructions: Digital files (both PDFs and database files) can be obtained on-line as described above at the publication web-site, or by sending a request to the Database Coordinator at the address shown above. Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: USGS Information Services Contact_Address: Address_Type: mailing address Address: Box 25286, Denver Federal Center City: Denver State_or_Province: CO Postal_Code: 80225-0046 Country: USA Contact_Voice_Telephone: (303) 202-4200 Contact_Voice_Telephone: 1-888-ASK-USGS Contact_Facsimile_Telephone: (303) 202-4695 Contact_Electronic_Mail_Address: infoservices@usgs.gov Hours_of_Service: Contact_Instructions: Resource_Description: USGS Miscellaneous Investigations I-2529 and USGS Data Series consist of both traditional geologic map products and ARC/INFO format geospatial databases. Furthermore, the traditional geologic map products (map sheets and pamphlets) can be obtained either as paper or as digital files. Distribution_Liability: Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. Although this publication has been subjected to rigorous review and is substantially complete, the USGS reserves the right to revise the data pursuant to further analysis and review. Furthermore, it is released on condition that neither the USGS nor the United States Government may be held liable for any damages resulting from its authorized or unauthorized use. Standard_Order_Process: Non-digital_Form: Paper copies of the map sheets and pamphlet can be obtained by contacting USGS Information Services via the contact information listed above. Metadata_Reference_Information: Metadata_Date: 5/4/06 Metadata_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: United States Geological Survey Contact_Person: Karen L. Wheeler Contact_Address: Address_Type: 345 Middlefield Rd. MS 973 City: Menlo Park State_or_Province: California Postal_Code: 94025 Contact_Voice_Telephone: 650-329-4935 Contact_Facsimile_Telephone: 650-329-4936 Contact_Electronic_Mail_Address: kwheeler@usgs.gov Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998 Metadata_Time_Convention: local time Metadata_Extensions: Online_Linkage: http://www.esri.com/metadata/esriprof80.html Profile_Name: ESRI Metadata Profile