Geologic map of the Saint Helens quadrangle, Clark and Cowlitz Counties, Washington

Metadata:

• Identification_Information
• Data_Quality_Information
• Spatial_Data_Organization_Information
• Spatial_Reference_Information
• Entity_and_Attribute_Information
• Distribution_Information
• Metadata_Reference_Information

Identification_Information:

Citation:

Citation_Information:

Originator: Russell C. Evarts

Originator: Philip Dinterman (database editor)

Originator: Evan Thoms (database editor)

Publication_Date: 2004

Title:

Geologic map of the Saint Helens quadrangle, Clark and Cowlitz Counties, Washington

Geospatial_Data_Presentation_Form: vector digital data

Online_Linkage: <http://pubs.usgs.gov/sim/2004/2834/>

Description:

Abstract:

This digital map database, compiled from previously published and unpublished data, and new mapping by the authors, represents the general distribution of bedrock and surficial deposits of the Ariel 7.5-minute quadrangle. The database delineates map units that are identified by general age and lithology following the stratigraphic nomenclature of the U.S. Geological Survey. The scale of the source maps limits the spatial resolution (scale) of the database to 1:24,000 or smaller.

Purpose:

This database and accompanying plot files depict the distribution of geologic materials and structures at a regional (1:24,000) 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 new 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:

Several different feature classes were generated within a geodatabase during the construction of the Saint Helens quadrangle geologic map. The topographic base map remains as a digital raster graphic (DRG) and is overlain on the geology feature class in ArcMap at a 60% transparency level. Some custom menus were used to project, transform, edit, tag, and build points in the map. A digital layout or map collar was made with Adobe Illustrator. The map was exported from the layout view in ArcMap as an Adobe Illustrator file and added to a single Adobe Illustrator file that also contained the description of map units, correlation of map units, cross sections, and an index map. Differences between the maps as they appear in the final map sheet and as they appear in the either the .mxd or .pmf files represent changes made in the Adobe Illustrator file to the symbology only and do not reflect any changes in the actual source data. The map is in UTM projection, zone 10, meters, and 1:24,000 scale. The explanatory pamphlet was saved to PDF from Microsoft Word.

Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: 2004

Currentness_Reference: publication date

Status:

Progress: Complete

Maintenance_and_Update_Frequency: As needed

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -122.875279

East_Bounding_Coordinate: -122.749440

North_Bounding_Coordinate: 45.875207

South_Bounding_Coordinate: 45.749793

Keywords:

Theme:

Theme_Keyword_Thesaurus: None

Theme_Keyword: geology

Theme_Keyword: surficial geology

Theme_Keyword: bedrock

Theme_Keyword: geologic history

Theme_Keyword: Pacific Northwest

Theme_Keyword: Saint Helens

Theme_Keyword: Washington

Theme_Keyword: Clark County

Theme_Keyword: Cowlitz County

Access_Constraints: None

Use_Constraints:

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 1:24,000 means that higher resolution information is not present in the dataset. Plotting at scales larger than 1:24,000 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.

Native_Data_Set_Environment:

Microsoft Windows 2000 Version 5.0 (Build 2195) Service Pack 4; ESRI ArcCatalog 8.3.0.800

Data_Quality_Information:

Lineage:

Process_Step:

Process_Description: Metadata imported.

Spatial_Data_Organization_Information:

Direct_Spatial_Reference_Method: Vector

Point_and_Vector_Object_Information:

SDTS_Terms_Description:

SDTS_Point_and_Vector_Object_Type: G-polygon

Point_and_Vector_Object_Count: 399

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: 0.000032

Ordinate_Resolution: 0.000032

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

Vertical_Coordinate_System_Definition:

Altitude_System_Definition:

Altitude_Resolution: 0.000010

Altitude_Encoding_Method:

Explicit elevation coordinate included with horizontal coordinates

Entity_and_Attribute_Information:

Detailed_Description:

Entity_Type:

Entity_Type_Label: sth_geo_poly

Attribute:

Attribute_Label: OBJECTID_1

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:

Attribute_Label: PERIMETER

Attribute:

Attribute_Label: GEO_POLY_

Attribute:

Attribute_Label: GEO_POLY_ID

Attribute:

Attribute_Label: PTYPE

Attribute_Definition: Geologic unit description

Attribute_Definition_Source: Author

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: af

Enumerated_Domain_Value_Definition:

Artificial fill (Holocene)-Unconsolidated soil, sand, gravel, and rock used to construct elevated road and railroad beds, levees, and dikes

Enumerated_Domain_Value_Definition_Source: Author

Enumerated_Domain:

Enumerated_Domain_Value: Qa

Enumerated_Domain_Value_Definition:

Alluvium (Holocene)-Unconsolidated, sand, silt, and gravel of active streams; poorly sorted to well sorted, massive to laminated, commonly cross-stratified. Deposits beneath Columbia River floodplain mostly fine sand and silt, those in valley of Scappoose Creek mostly gravel. Locally includes fine-grained lacustrine, eolian, and organic-rich marsh deposits. Alluvium and minor dredge spoils deposited in Columbia River since 1880 shown with ruled pattern

Enumerated_Domain_Value_Definition_Source: Author

Enumerated_Domain:

Enumerated_Domain_Value: Qls

Enumerated_Domain_Value_Definition:

Landslide deposits (Holocene and Pleistocene)-Unsorted, angular, mixed bedrock and surficial material transported downslope en masse. Mapped slides predominantly deep-seated failures ranging from semi-coherent slumps to internally disrupted earthflow and debris-flow deposits. Most slides generated by failure of thick clayey saprolite derived from intense weathering of Grande Ronde Basalt and Sandy River Mudstone along valley walls in northwest part of quadrangle

Enumerated_Domain_Value_Definition_Source: Author

Enumerated_Domain:

Enumerated_Domain_Value: Qfs

Enumerated_Domain_Value_Definition:

Cataclysmic flood deposits, fine-grained facies (Pleistocene)-Unconsolidated clay, silt, and fine to medium sand. Blankets most terrain between Scappoose and Saint Helens below 300 feet (90 m) but above Holocene floodplains. Well logs indicate deposits locally exceed 30 m in thickness. Composed largely of quartz, feldspar, and muscovite, which indicate deposition by Columbia River rather than by local streams. Interpreted as slack-water deposits of large floods initiated by failure of ice dam at Glacial Lake Missoula in western Montana during the late Pleistocene (Bretz, 1925, 1959, Bretz and others, 1956; Waitt, 1980, 1985, 1994, 1996; Baker and Bunker, 1985; Atwater, 1986; O'Connor and Baker, 1992; Benito and O'Connor, 2003). Floodwaters hydraulically dammed by relatively narrow constriction of Columbia River valley north of quadrangle, ponded in Portland Basin and deposited suspended sediment load (Trimble, 1963). Rare fresh exposures reveal rhythmite beds several centimeters thick, each bed possibly the product of a separate flood (Waitt, 1980, 1985, 1994; Clague and others, 2003; Benito and O'Connor, 2003). In most exposures, however, deposit is oxidized light brown and bedding is inconspicuous. Thin unmapped deposits of similar character locally mantle topography to elevations as high as 350 ft (110 m). Radiocarbon and tephrochronologic data from outside the map area indicate depositional ages between about 17,000 and 13,000 14C years B.P. (Waitt, 1994; Clague and others, 2003)

Enumerated_Domain_Value_Definition_Source: Author

Enumerated_Domain:

Enumerated_Domain_Value: QTc

Enumerated_Domain_Value_Definition:

Conglomerate (Pleistocene? and Pliocene)-Semi-consolidated pebble to cobble conglomerate; thick-bedded, poorly sorted to moderately well-sorted, clast-supported, commonly imbricated and crossbedded. Contains minor lenses, generally <2 m thick, of basaltic or quartzose sand; cemented by clay and limonite. Forms ridge trending north-northeast from Scappoose and underlies finer grained Holocene sediments (Qa) beneath floodplain to east; at least 60 m thick according to water-well drillers' logs. Well-rounded to subangular clasts generally £20 cm across but locally as large as 60 cm across. Clast population dominated by volcanic rocks eroded from Columbia River Basalt Group and western Cascade Range; scarce pebbles of quartzite and Plio-Pleistocene olivine-bearing basalt also present; weathering rinds typically 1-2 mm thick. Pronounced clast imbrication and foreset bedding indicate northerly transport directions. Age uncertain; a sandstone bed near Scappoose contains glass shards compositionally similar to Miocene to Pliocene tephras from the Snake River Plain in Idaho but lacks shards resembling tephras from the Quaternary Cascade Range (A.W. Sarna-Wojcicki, written commun., 2000), which suggests a Pliocene or early Pleistocene depositional age

Enumerated_Domain_Value_Definition_Source: Author

Enumerated_Domain:

Enumerated_Domain_Value: Tsr

Enumerated_Domain_Value_Definition:

Sandy River Mudstone (Miocene)-Highly weathered and poorly exposed claystone, mudstone, siltstone, and minor pebble conglomerate. Beds varicolored, commonly limonite stained and cemented, locally contain abundant woody fragments; some are tuffaceous. Unconformably overlies member of Sentinel Bluffs (Tgsb) of the Grande Ronde Basalt west of Saint Helens; observed only in highwall of quarry along Hankey Road near confluence of Dart and Perry Creeks, hence distribution as shown on map is very uncertain. Fine-grained strata that underlie gravel (QTc) below surface of southern half of quadrangle (Swanson and others, 1993) are believed to be equivalent. At least 20 m and possibly as much as 40 m thick east of Saint Helens; probably much thicker in subsurface of southern part of map area. Lithology and stratigraphic position suggest correlation with Sandy River Mudstone (Trimble, 1963)

Enumerated_Domain_Value_Definition_Source: Author

Enumerated_Domain:

Enumerated_Domain_Value: Tgsb

Enumerated_Domain_Value_Definition:

Grande Ronde Basalt (Miocene)-Light- to dark-gray flows of tholeiitic basaltic andesite; vesicular to microvesicular, aphyric to microphyric to very sparsely plagioclase-phyric; exhibit relatively low-TiO2 contents (table 1) characteristic of the Grande Ronde Formation of the Columbia River Basalt Group (Mangan and others, 1986; Beeson and others, 1989; Reidel and others, 1989). Exposed in northern part of quadrangle and to north, where they unconformably overlie Paleogene sedimentary rocks (Evarts, 2002). Where best exposed in quarry-wall exposures, flows typically exhibit well-developed colonnade and entablature jointing patterns and vesicular flow tops. Typical samples are intergranular to intersertal, with lathlike plagioclase, granular clinopyroxene, and Fe-Ti oxide crystals in abundant dark glass; some flows contain rare pigeonite, olivine or orthopyroxene microphenocrysts. Textures resemble those described by Long and Wood (1986) for correlative flows on the Columbia Plateau. Basalt erupted from vents in eastern part of Plateau and entered northwestern Oregon and southwestern Washington through a wide gap in the Cascade Range (Tolan and others, 1989; Reidel and others, 1989; Wells and others, 1989). Water-well drillers' logs indicate aggregate thickness of flows in Saint Helens quadrangle may exceed 160 m. In highlands of northwest part of quadrangle, upper several meters thoroughly weathered to massive red saprolite, and exposures of fresh rock are limited to creek beds. Along Columbia River, however, late Pleistocene jökulhlaups stripped overburden from basalt at elevations below about 200 feet (60 m), creating a bedrock platform with scabland topography. Based on field, chemical and paleomagnetic properties, Grande Ronde Basalt flows in this quadrangle are assigned to informal members corresponding to those defined by Reidel and others (1989) on the Columbia Plateau (terminology follows Reidel, 1998)

Enumerated_Domain_Value_Definition_Source: Author

Enumerated_Domain:

Enumerated_Domain_Value: Tgww

Enumerated_Domain_Value_Definition:

Grande Ronde Basalt (Miocene)-Light- to dark-gray flows of tholeiitic basaltic andesite; vesicular to microvesicular, aphyric to microphyric to very sparsely plagioclase-phyric; exhibit relatively low-TiO2 contents (table 1) characteristic of the Grande Ronde Formation of the Columbia River Basalt Group (Mangan and others, 1986; Beeson and others, 1989; Reidel and others, 1989). Exposed in northern part of quadrangle and to north, where they unconformably overlie Paleogene sedimentary rocks (Evarts, 2002). Where best exposed in quarry-wall exposures, flows typically exhibit well-developed colonnade and entablature jointing patterns and vesicular flow tops. Typical samples are intergranular to intersertal, with lathlike plagioclase, granular clinopyroxene, and Fe-Ti oxide crystals in abundant dark glass; some flows contain rare pigeonite, olivine or orthopyroxene microphenocrysts. Textures resemble those described by Long and Wood (1986) for correlative flows on the Columbia Plateau. Basalt erupted from vents in eastern part of Plateau and entered northwestern Oregon and southwestern Washington through a wide gap in the Cascade Range (Tolan and others, 1989; Reidel and others, 1989; Wells and others, 1989). Water-well drillers' logs indicate aggregate thickness of flows in Saint Helens quadrangle may exceed 160 m. In highlands of northwest part of quadrangle, upper several meters thoroughly weathered to massive red saprolite, and exposures of fresh rock are limited to creek beds. Along Columbia River, however, late Pleistocene jökulhlaups stripped overburden from basalt at elevations below about 200 feet (60 m), creating a bedrock platform with scabland topography. Based on field, chemical and paleomagnetic properties, Grande Ronde Basalt flows in this quadrangle are assigned to informal members corresponding to those defined by Reidel and others (1989) on the Columbia Plateau (terminology follows Reidel, 1998)-Member of Sentinel Bluffs-Two or more flows characterized by intermediate to high MgO contents (3.9 to 4.9 wt percent) and normal magnetic polarity. Underlies most of northwestern part of map area as well as the topographically complex area between the Lewis and Lake Rivers in Washington. Contains scarce plagioclase phenocrysts and glomerocrysts of plagioclase and olivine as large as 1 cm across in microphyric, intersertal to intergranular groundmass; minor olivine commonly present in groundmass. As much as 90 m or more thick. Chemistry, petrography, and remanent magnetization direction (J.T. Hagstrum, written commun., 1999) indicate equivalence with Sentinel Bluffs unit of Reidel and others (1989; Beeson and others, 1989; Wells and others, 1989), which is within the N2 magnetostratigraphic unit of Swanson and others (1979) and was emplaced at 15.6±0.2 Ma (Long and Duncan, 1983)

Enumerated_Domain_Value_Definition_Source: Author

Enumerated_Domain:

Enumerated_Domain_Value: Tgo

Enumerated_Domain_Value_Definition:

Grande Ronde Basalt (Miocene)-Light- to dark-gray flows of tholeiitic basaltic andesite; vesicular to microvesicular, aphyric to microphyric to very sparsely plagioclase-phyric; exhibit relatively low-TiO2 contents (table 1) characteristic of the Grande Ronde Formation of the Columbia River Basalt Group (Mangan and others, 1986; Beeson and others, 1989; Reidel and others, 1989). Exposed in northern part of quadrangle and to north, where they unconformably overlie Paleogene sedimentary rocks (Evarts, 2002). Where best exposed in quarry-wall exposures, flows typically exhibit well-developed colonnade and entablature jointing patterns and vesicular flow tops. Typical samples are intergranular to intersertal, with lathlike plagioclase, granular clinopyroxene, and Fe-Ti oxide crystals in abundant dark glass; some flows contain rare pigeonite, olivine or orthopyroxene microphenocrysts. Textures resemble those described by Long and Wood (1986) for correlative flows on the Columbia Plateau. Basalt erupted from vents in eastern part of Plateau and entered northwestern Oregon and southwestern Washington through a wide gap in the Cascade Range (Tolan and others, 1989; Reidel and others, 1989; Wells and others, 1989). Water-well drillers' logs indicate aggregate thickness of flows in Saint Helens quadrangle may exceed 160 m. In highlands of northwest part of quadrangle, upper several meters thoroughly weathered to massive red saprolite, and exposures of fresh rock are limited to creek beds. Along Columbia River, however, late Pleistocene jökulhlaups stripped overburden from basalt at elevations below about 200 feet (60 m), creating a bedrock platform with scabland topography. Based on field, chemical and paleomagnetic properties, Grande Ronde Basalt flows in this quadrangle are assigned to informal members corresponding to those defined by Reidel and others (1989) on the Columbia Plateau (terminology follows Reidel, 1998)-Member of Ortley-Aphyric, intersertal to intergranular basalt with relatively low MgO contents (3.5 to 3.6 wt percent) and normal magnetic polarity. Underlies member of Winter Water (Tgww) in northern Saint Helens where about 25 m of this flow exposed. Chemically and paleomagnetically equivalent to Ortley unit of Reidel and others (1989; Beeson and others, 1989; Wells and others, 1989), which is within the N2 magnetostratigraphic unit of Swanson and others (1979)

Enumerated_Domain_Value_Definition_Source: Author

Enumerated_Domain:

Enumerated_Domain_Value: Tpb

Enumerated_Domain_Value_Definition:

Pittsburg Bluff Formation (Oligocene)-Shown on cross section only. Massive, friable, well-bedded, fine- to coarse-grained, tuffaceous, arkosic, and lithic sandstone, siltstone, shale, and rare granule and pebble conglomerate. Depositional environments range from shallow marine to subaerial. Outcrops to north and northwest of quadrangle contain a molluscan fauna similar to that in the Eocene-Oligocene Pittsburg Bluff Formation (Wilkinson and others, 1946; Evarts, 2002)

Enumerated_Domain_Value_Definition_Source: Author

Enumerated_Domain:

Enumerated_Domain_Value: Tvu

Enumerated_Domain_Value_Definition:

Volcanic rocks, undivided (Eocene)-Shown on cross section only. Undifferentiated mafic to silicic lava flows and volcaniclastic rocks of the western Cascade Range

Enumerated_Domain_Value_Definition_Source: Author

Attribute:

Attribute_Label: STYLE

Attribute:

Attribute_Label: Shape_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: Shape_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: Shape_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: Shape_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.

Detailed_Description:

Entity_Type:

Entity_Type_Label: Anno_84_88

Detailed_Description:

Entity_Type:

Entity_Type_Label: sth_geo_polyAnno

Attribute:

Attribute_Label: OBJECTID

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: FeatureID

Attribute:

Attribute_Label: ZOrder

Attribute:

Attribute_Label: AnnotationClassID

Attribute:

Attribute_Label: Element

Attribute:

Attribute_Label: SHAPE_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: SHAPE_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.

Detailed_Description:

Entity_Type:

Entity_Type_Label: Anno_84_88

Detailed_Description:

Entity_Type:

Entity_Type_Label: sth_geo_arc

Attribute:

Attribute_Label: OBJECTID_1

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:

Attribute_Label: TNODE_

Attribute:

Attribute_Label: LPOLY_

Attribute:

Attribute_Label: RPOLY_

Attribute:

Attribute_Label: LENGTH

Attribute:

Attribute_Label: GEO_ARC_

Attribute:

Attribute_Label: GEO_ARC_ID

Attribute:

Attribute_Label: LTYPE

Attribute_Definition: Geologic Contact Description

Attribute_Definition_Source: Author

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: contact, approx. located

Enumerated_Domain_Value_Definition:

Approximately located boundary between geologic units; positional accuracy generally within 5 mm at 1:24,000 (120 m on the ground)

Enumerated_Domain:

Enumerated_Domain_Value: contact, certain

Enumerated_Domain_Value_Definition:

Boundary between geologic units, positional accuracy generally within 2 mm at 1:24,000 (48 m on the ground)

Enumerated_Domain:

Enumerated_Domain_Value: contact, inferred

Enumerated_Domain_Value_Definition:

Boundary of uncertain location between geologic units; positional accuracy uncertain contact exists but location inferred from indirect evidence

Enumerated_Domain:

Enumerated_Domain_Value: fault, approx. located

Enumerated_Domain_Value_Definition:

Trace of approximately located fault positional accuracy generally within 5 mm at 1:24,000 (120 m on the ground)

Enumerated_Domain:

Enumerated_Domain_Value: fault, concealed

Enumerated_Domain_Value_Definition:

Trace of fault concealed by younger unit positional accuracy uncertain but probably generally within 5 mm at 1:24,000 (120 m on the ground)

Enumerated_Domain:

Enumerated_Domain_Value: fault, concealed, queried

Enumerated_Domain_Value_Definition:

Trace of possible fault concealed by younger unit positional accuracy uncertain but probably generally within 5 mm at 1:24,000 (120 m on the ground)

Enumerated_Domain:

Enumerated_Domain_Value: map boundary

Enumerated_Domain_Value_Definition: map boundary of this 1:24000 study

Enumerated_Domain:

Enumerated_Domain_Value: reverse fault, concealed

Enumerated_Domain_Value_Definition:

Trace of reverse fault concealed by younger unit positional accuracy uncertain but probably generally within 5 mm at 1:24,000 (120 m on the ground)

Enumerated_Domain:

Enumerated_Domain_Value: s.s. fault, r.l., concealed_m

Enumerated_Domain_Value_Definition:

Trace of right lateral strike-slip fault concealed by younger unit positional accuracy uncertain but probably generally within 5 mm at 1:24,000 (120 m on the ground) with marker

Enumerated_Domain:

Enumerated_Domain_Value: water boundary, certain

Enumerated_Domain_Value_Definition:

Outline of a body of open water; positional accuracy within 1:24,000 National Map Accuracy Standards

Attribute:

Attribute_Label: Shape_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: SYMB

Attribute:

Attribute_Label: Shape_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.

Detailed_Description:

Entity_Type:

Entity_Type_Label: sth_stx_arc

Attribute:

Attribute_Label: OBJECTID_1

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:

Attribute_Label: TNODE_

Attribute:

Attribute_Label: LPOLY_

Attribute:

Attribute_Label: RPOLY_

Attribute:

Attribute_Label: LENGTH

Attribute:

Attribute_Label: STX_ARC_

Attribute:

Attribute_Label: STX_ARC_ID

Attribute:

Attribute_Label: LTYPE

Attribute_Definition: Structural features description

Attribute_Definition_Source: Author

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: cross section

Enumerated_Domain_Value_Definition: Location of author's cross section lines

Enumerated_Domain:

Enumerated_Domain_Value: f.a., syncline, concealed

Enumerated_Domain_Value_Definition:

fold axis, syncline concealed by younger unit positional accuracy uncertain but probably generally within 5 mm at 1:24,000 (120 m on the ground)

Enumerated_Domain:

Enumerated_Domain_Value: f.a., syncline, concealed, plungeE

Enumerated_Domain_Value_Definition:

fold axis, syncline concealed by younger unit positional accuracy uncertain but probably generally within 5 mm at 1:24,000 (120 m on the ground), plunge to the east

Enumerated_Domain:

Enumerated_Domain_Value: f.a., syncline, concealedm

Enumerated_Domain_Value_Definition:

fold axis, syncline concealed by younger unit positional accuracy uncertain but probably generally within 5 mm at 1:24,000 (120 m on the ground) with marker

Attribute:

Attribute_Label: Shape_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.

Detailed_Description:

Entity_Type:

Entity_Type_Label: sth_chem_pt

Attribute:

Attribute_Label: OBJECTID

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: OBJECTID_1

Attribute_Definition: Internal feature number

Attribute_Definition_Source: ESRI

Attribute:

Attribute_Label: PTTYPE

Attribute_Definition: Type of chemical analysis

Attribute_Definition_Source: Author

Attribute:

Attribute_Label: SAMPNO

Attribute_Definition: Sample number used in field collection

Attribute_Definition_Source: Author

Attribute:

Attribute_Label: map_no

Attribute_Definition: Number designation on map

Attribute:

Attribute_Label: LATITUDE__

Attribute_Definition: Measurement of latitude

Attribute:

Attribute_Label: LONGITUDE_

Attribute_Definition: Measurement of longitude

Attribute:

Attribute_Label: MAP_UNIT

Attribute_Definition: Geologic unit sample is located within

Attribute:

Attribute_Label: ROCK_TYPE

Attribute_Definition: Physical type of rock from which sample was taken

Attribute:

Attribute_Label: SIO2

Attribute_Definition: Silicon concentration expressed as weight percent oxide

Attribute:

Attribute_Label: TIO2

Attribute_Definition: Titanium concentration expressed as weight percent oxide

Attribute:

Attribute_Label: AL2O3

Attribute_Definition: Aluminum concentration expressed as weight percent oxide

Attribute:

Attribute_Label: FEO

Attribute_Definition: Ferrous iron concentration expressed as weight percent oxide

Attribute:

Attribute_Label: MNO

Attribute_Definition: Manganese concentration expressed as weight percent oxide

Attribute:

Attribute_Label: MGO

Attribute_Definition: Magnesium concentration expressed as weight percent oxide

Attribute:

Attribute_Label: CAO

Attribute_Definition: Calcium concentration expressed as weight percent oxide

Attribute:

Attribute_Label: NA2O

Attribute_Definition: Sodium concentration expressed as weight percent oxide

Attribute:

Attribute_Label: K2O

Attribute_Definition: Potassium concentration expressed as weight percent oxide

Attribute:

Attribute_Label: P2O5

Attribute_Definition: Phosphorous concentration expressed as weight percent oxide

Attribute:

Attribute_Label: TOTAL

Attribute_Definition: Total of weight percent oxides

Attribute:

Attribute_Label: SIO2_N

Attribute_Definition:

Silicon expressed as weight percent oxide from analysis recalculated volatile-free

Attribute:

Attribute_Label: TIO2_N

Attribute_Definition:

Titanium expressed as weight percent oxide from analysis recalculated volatile-free

Attribute:

Attribute_Label: AL2O3_N

Attribute_Definition:

Aluminum expressed as weight percent oxide from analysis recalculated volatile-free

Attribute:

Attribute_Label: FEO_N

Attribute_Definition:

Ferrous Iron expressed as weight percent oxide from analysis recalculated volatile-free

Attribute:

Attribute_Label: MNO_N

Attribute_Definition:

Manganese expressed as weight percent oxide from analysis recalculated volatile-free

Attribute:

Attribute_Label: MGO_N

Attribute_Definition:

Magnesium expressed as weight percent oxide from analysis recalculated volatile-free

Attribute:

Attribute_Label: CAO_N

Attribute_Definition:

Calcium expressed as weight percent oxide from analysis recalculated volatile-free

Attribute:

Attribute_Label: NA2O_N

Attribute_Definition:

Sodium expressed as weight percent oxide from analysis recalculated volatile-free

Attribute:

Attribute_Label: K2O_N

Attribute_Definition:

Potassium expressed as weight percent oxide from analysis recalculated volatile-free

Attribute:

Attribute_Label: P2O5_N

Attribute_Definition:

Phosphorous expressed as weight percent oxide from analysis recalculated volatile-free

Attribute:

Attribute_Label: TEXTURE

Attribute_Definition: Rock and groundmass texture

Attribute:

Attribute_Label: MG_

Attribute_Definition: Atomic ratio 100Mg/(Mg+Fe2+) with Fe2+ set to 0.85x Fetotal

Attribute:

Attribute_Label: BA

Attribute_Definition: Barium concentration in parts per million

Attribute:

Attribute_Label: RB

Attribute_Definition: Rubidium concentration in parts per million

Attribute:

Attribute_Label: SR

Attribute_Definition: Strontium concentration in parts per million

Attribute:

Attribute_Label: Y

Attribute_Definition: Yttrium concentration in parts per million

Attribute:

Attribute_Label: ZR

Attribute_Definition: Zirconium concentration in parts per million

Attribute:

Attribute_Label: NB

Attribute_Definition: Niobium concentration in parts per million

Attribute:

Attribute_Label: NI

Attribute_Definition: Nickel concentration in parts per million

Attribute:

Attribute_Label: CU

Attribute_Definition: Copper concentration in parts per million

Attribute:

Attribute_Label: ZN

Attribute_Definition: Zinc concentration in parts per million

Attribute:

Attribute_Label: CR

Attribute_Definition: Chromium concentration in parts per million

Detailed_Description:

Entity_Type:

Entity_Type_Label: Anno_97_98

Detailed_Description:

Entity_Type:

Entity_Type_Label: sth_chem_ptAnno

Attribute:

Attribute_Label: OBJECTID

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: FeatureID

Attribute:

Attribute_Label: ZOrder

Attribute:

Attribute_Label: AnnotationClassID

Attribute:

Attribute_Label: Element

Attribute:

Attribute_Label: SHAPE_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: SHAPE_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.

Detailed_Description:

Entity_Type:

Entity_Type_Label: Anno_97_98

Detailed_Description:

Entity_Type:

Entity_Type_Label: sth_erratics_pt

Attribute:

Attribute_Label: OBJECTID

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: PTTYPE

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: glacial erratic

Enumerated_Domain_Value_Definition: location of Missoula Flood derived glacial erratic

Detailed_Description:

Entity_Type:

Entity_Type_Label: sth_wells_pt

Attribute:

Attribute_Label: OBJECTID

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: PTTYPE

Attribute_Definition: Well point data

Attribute_Definition_Source: Oregon Department of Water Resources

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: water well

Enumerated_Domain_Value_Definition: Type of well

Attribute:

Attribute_Label: NAME

Attribute_Definition: Showing Oregon State Water Resources Department well number

Attribute_Definition_Source: Oregon Department of Water Resources

Detailed_Description:

Entity_Type:

Entity_Type_Label: Anno_86_92

Detailed_Description:

Entity_Type:

Entity_Type_Label: sth_wells_ptAnno

Attribute:

Attribute_Label: OBJECTID

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: FeatureID

Attribute:

Attribute_Label: ZOrder

Attribute:

Attribute_Label: AnnotationClassID

Attribute:

Attribute_Label: Element

Attribute:

Attribute_Label: SHAPE_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: SHAPE_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.

Detailed_Description:

Entity_Type:

Entity_Type_Label: Anno_86_92

Distribution_Information:

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

Resource_Description:

Downloadable Data USGS Scientific Investigations Map SIM-2834

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.

Fees:

Plotting fees are set by USGS Information Services, and may be obtained by contacting them via the contact information given above.

Metadata_Reference_Information:

Metadata_Date: 20040527

Metadata_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: U.S. Geological Survey

Contact_Person: Karen Wheeler

Contact_Address:

Address_Type: mailing address

Address: 345 Middlefield Rd., MS 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

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