Identification_Information: Citation: Citation_Information: Originator: Douglas M. Morton Publication_Date: 2003 Title: Preliminary Geologic Map of the Fontana 7.5' Quadrangle, Riverside and San Bernardino Counties, California Edition: Version 1.0 Geospatial_Data_Presentation_Form: vector digital data Series_Information: Series_Name: U.S. Geological Survey Open-File Report Issue_Identification: USGS OFR 03-418 Publication_Information: Publication_Place: Menlo Park, California Publisher: U.S. Geological Survey Online_Linkage: Online_Linkage URL:http://geopubs.wr.usgs.gov/open-file/of03-418 Description: Abstract: The Fontana 7.5' quadrangle is located in the northern part of the Perris Block (English, 1926, Woodford, and others, 1971), a rectangular shaped and relatively tectonically stable structural block located between the San Jacinto and Elsinore Fault zones at the north end of the Peninsular Ranges Provinces (Jahns, 1954). Included in the southern part of the quadrangle are the Jurupa Mountains, that along with rocks exposed in the San Bernardino South 7.5' quadrangle to the east, are underlain by exposures of the northernmost Peninsular Ranges province basement rocks. The oldest rocks are a sequence of amphibolite grade metamorphic rocks consisting of predominantly biotite-quartz schist and lesser amounts of quartzite, marble, and amphibolite. The marble forms relatively thick layers, most of which have been quarried, mainly for manufacturing of cement. Pyroxene hornfels facies skarn occurs along contact zones between marble and intrusive granitic rocks. Major marble quarries include the Crestmore quarries at the eastern part of the quadrangle and the Jensen quarry at the eastern end of the Jurupa Mountains; smaller quarries are the Henshaw quarry located between the Crestmore quarries and the Jensen Quarry, and the Glen Avon Quarry located in the western part of the Jurupa Mountains. Much of the marble at the Crestmore quarries has a characteristic blue color. The Crestmore quarries are known worldwide for the large number of rare minerals found in the contact metamorphic rocks (about 150 mineral species, e.g., Murdoch and Webb, 1966). Most of the unusual minerals occur in a metasomatic zone between marble and a monzogranite intrusive in the Commercial Quarry (e.g., Burnham, 1959, Woodford and others, 1941). Based upon the abundance of marble in the section, these metasedimentary rocks are considered to be of Paleozoic age. Intruding the metamorphic rocks are Cretaceous-age granitic rocks, the northern part of the Peninsular Ranges batholith. These batholithic rocks range in composition from gabbro to granitic pegmatite dikes. Biotite-hornblende tonalite is the most abundant granitic rock, but there is a large biotite granodiorite body located near the central part of the Jurupa Mountains. Emplacement age of the tonalite, based on U/Pb analyses of zircon, is 104 +/- 0.4 Ma (W.R. Premo, Written Com., 2003). Sr/Rb isochron whole rock age is 117.6 +/- 6 Ma (R.W. Kistler, Written Com., 2000). Granodiorite (Kgd) gave a zircon U/Pb age of 108 +/- 6 Ma (W.R. Premo, Written Com., 2003). Tonalite and granodiorite commonly have two planar fabrics, a planar fabric oriented northwest that is typical Peninsular Range Batholith and one that is atypical striking east and northeast; both planar fabrics are produced by oriented hornblende and biotite and ellipsoidal to pancake-shaped mafic inclusions. East and northeast oriented inclusions are generally noticeably more attenuated than the northwest oriented inclusions. Commonly a single outcrop includes both fabric planes; where discernible the northwest striking fabric is older than the east and northeast oriented fabric. The granitic rocks are some of the closest granitic rocks to the Los Angeles Metropolitan area that can be used for construction purposes. As such, the tonalite and granodiorite have been extensively quarried for the construction of breakwaters and a variety of other engineering projects. A major quarrying operation was located at the north central part of the Jurupa Mountains at Declezville where a rail line spur was constructed for transportation of tonalite. Another large quarry is located in the hills immediately east of the Jurupa Mountains. Currently the only active quarry is the Stringfellow quarries developed in granodiorite and located in the south central part of the Jurupa Mountains. The northern half of the quadrangle is covered by unconsolidated boulder and cobble-bearing alluvium of the distal part of the Lytle Creek fan that emanates from the San Gabriel Mountains north of the quadrangle. An older alluvial-fan deposit derived from the eastern San Gabriel Mountains once covered the Jurupa Mountains; cobbles of eastern San Gabriel Mountains rocks, remnants of this now vanished fan, occur along ridge tops of the Jurupa Mountains and the hill to the east of the mountains (Morton and Matti, 1989). Pleistocene alluvial-fan deposits flank the south side of the Jurupa Mountains. Most of these deposits are well indurated, brown, sandy deposits containing cobble deposits near the south side of the mountains; clasts are locally derived from the Jurupa Mountains. The active channel of the Santa Ana River is located in the southeast corner of the quadrangle. Purpose: The data set for the Fontana 7.5' quadrangle was prepared under the U.S. Geological Survey Southern California Areal Mapping Project (SCAMP) as part of an ongoing effort to develop a regional geologic framework of southern California, and to utilize a Geographic Information System (GIS) format to create regional digital geologic databases. These regional databases are being developed as contributions to the National Geologic Map Database of the National Cooperative Geologic Mapping Program of the USGS. Supplemental_Information: none Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2003 Currentness_Reference: New data Status: Progress: Complete Maintenance_and_Update_Frequency: As Needed Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -117.50009183 East_Bounding_Coordinate: -117.37490817 North_Bounding_Coordinate: 34.12499996 South_Bounding_Coordinate: 33.99998421 Keywords: Theme: Theme_Keyword_Thesaurus: None Theme_Keyword: geologic map Theme_Keyword: bedrock geology Theme_Keyword: plutonic rock structure Place: Place_Keyword_Thesaurus: None Place_Keyword: California Place_Keyword: San Bernardino County Place_Keyword: Riverside County Place_Keyword: Fontana quadrangle Place_Keyword: marble quarries Place_Keyword: Crestmore Quarry Place_Keyword: Jensen Quarry Stratum: Stratum_Keyword_Thesaurus: None Stratum_Keyword: granitic rocks Stratum_Keyword: tonalite Stratum_Keyword: granodiorite Stratum_Keyword: metamorphic rocks Stratum_Keyword: marble Stratum_Keyword: alluvial fan Temporal: Temporal_Keyword_Thesaurus: None Temporal_Keyword: Paleozoic(?) metasedimentary rocks Temporal_Keyword: Cretaceous plutonic rocks Access_Constraints: None Use_Constraints: The Fontana 7.5' geologic-map database should be used to evaluate and understand the geologic character of the Fontana 7.5' quadrangle as a whole. The data should not be used for purposes of site-specific land-use planning or site-specific geologic evaluations. The database is sufficiently detailed to identify and characterize many actual and potential geologic hazards represented by faults and landslides and posed by ground subsidence and earthquake-generated ground shaking. However, it is not sufficiently detailed for site-specific determinations or evaluations of these features. Faults shown do not take the place of fault-rupture hazard zones designated by the California State Geologist (see Hart, 1988). Use of this digital geologic-map database 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 compiled and edited at a scale of 1:24,000 means that higher resolution information may not have been uniformly retained 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, although higher resolution data is incorporated in most of the map, the resolution of the combined output will be limited by the lower resolution data. Point_of_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Douglas M. Morton Contact_Organization: U.S. Geological Survey, Western Region, Earth Surface Processes Team Contact_Position: Project Geologist Contact_Address: Address_Type: mailing address Address: U.S. Geological Survey Address: Department of Earth Sciences Address: University of California, Riverside City: Riverside State_or_Province: California Postal_Code: 92521 Country: United States of America Contact_Voice_Telephone: (909) 276-6397 Contact_Facsimile_Telephone: (909) 276-6295 Contact_Electronic_Mail_Address: scamp@usgs.gov Data_Set_Credit: Geologic mapping and digital preparation of this report were sponsored by (1) the Southern California Areal Mapping Project (SCAMP). Native_Data_Set_Environment: SunOS, 5.8, sun4m UNIX ARC/INFO version 7.2.1 Cross_Reference: Citation_Information: Originator: Douglas M. Morton and Fred K. Miller Publication_Date: 2003 Title: Preliminary geologic map of the San Bernardino 30'x60' quadrangle, California Geospatial_Data_Presentation_Form: vector digital data Series_Information: Series_Name: U.S. Geological Survey Open-File Report Issue_Identification: USGS OF 03-293 Publication_Information: Publication_Place: California Publisher: U.S. Geological Survey Online_Linkage: http://geopubs.wr.usgs.gov/open-file/of03-293 Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: Geologic-map units in the Fontana quadrangle database were described using standard field methods. Consistent with these methods, the database author has assigned standard geologic attributes to geologic lines, points, and polygons identified in the database. Nation-wide geologic-map accuracy standards have not been developed and adopted by the U.S. Geological Survey and other earth-science entities. Until such standards are adopted, the SCAMP project has developed internal map-accuracy standards for 1:24,000-scale geologic maps produced by the project. Geologic lines and points on 1:24,000 scale geologic maps are judged to meet SCAMP's internal map-accuracy standards if they are located to within +/-15 meters, relative to topographic or cultural features on the base map. On any derivative geologic-map plot, line data that are judged to meet the SCAMP internal map-accuracy standard are denoted by solid lines; line data that may not meet the SCAMP internal map-accuracy standard are denoted by dashed or dotted lines. There is no cartographic device for denoting the map-accuracy for geologic-point data (e.g., symbols representing bedding, foliation, lineations, etc.). Logical_Consistency_Report: Polygon and chain-node topology present. The areal extent of the map is represented digitally by an appropriately projected (polyconic projection), mathematically generated box. Consequently, polygons intersecting the lines that comprise the map boundary are closed by that boundary. Polygons internal to the map boundary are completely enclosed by line segments which are themselves a set of sequentially numbered coordinate pairs. Point data are represented by coordinate pairs. Completeness_Report: The geologic map database of the Fontana 7.5' quadrangle contains new data that have been subjected to rigorous review and are a substantially complete representation of the current state of knowledge concerning the geology of the quadrangle. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: The maximum transformation RMS error acceptable for a 7.5' quadrangle transformation and data input is 0.003 (1.8 meters). Horizontal positional accuracy was checked by visual comparison of hard-copy plots with base-stable source data. Lineage: Process_Step: Process_Description: Field mapping and aerial photograph interpretation; iterative process (D.M. Morton). Process_Date: 1978-79; 1990-99 Process_Step: Process_Description: Digitization of geologic linework and point data from a scale-stable cartographic base of quadrangle. ARC/INFO database established; cleanup of artifacts; polygon, arc, and point attribute tables established. Digitizing and editing artifacts significant enough to display at a scale of 1:24,000 were corrected (K.R. Bovard and P.M. Cossett). Process_Date: 2000; 2003 Process_Step: Process_Description: Description of map units and correlation of map units (K.R. Bovard). Process_Date: 2003 Process_Step: Process_Description: First draft of metadata created by K.R. Bovard using FGDCMETA.AML ver. 1.2 05/14/98 on ARC/INFO data set /scamp31/kbovard/fontana/fon_geo Process_Date: 20030826 Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: Vector Point_and_Vector_Object_Information: SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: Point Point_and_Vector_Object_Count: 165 SDTS_Point_and_Vector_Object_Type: String Point_and_Vector_Object_Count: 619 SDTS_Point_and_Vector_Object_Type: GT-polygon composed of chains Point_and_Vector_Object_Count: 166 Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Planar: Map_Projection: Map_Projection_Name: Polyconic Polyconic: Latitude_of_Projection_Origin: 34.000 Longitude_of_Central_Meridian: -117.4375 False_Easting: 0.00000 False_Northing: 0.00000 Planar_Coordinate_Information: Planar_Coordinate_Encoding_Method: coordinate pair Coordinate_Representation: Abscissa_Resolution: 1.0 Ordinate_Resolution: 1.0 Planar_Distance_Units: Meters Geodetic_Model: Horizontal_Datum_Name: North American Datum of 1927 Ellipsoid_Name: Clarke 1866 Semi-major_Axis: 6378206.4 Denominator_of_Flattening_Ratio: 294.98 Entity_and_Attribute_Information: Overview_Description: Entity_and_Attribute_Overview: Version 1.0 of the Fontana 7.5' quadrangle comprises three ARC/INFO coverages, of which two contain geologic data, and one contains cartographic features: fon_geo (geology), fon_str (structural data), and fon_ano (annotation and leaders). Geologic data represented by line entities and the polygons they delineate are contained in the coverage FON_GEO. For display purposes, the annotation coverage contains one annotation subclass: anno.geo contains unit labels. Geological point data includes site-specific information describing the types and the orientation of foliation, joints and lineations. Annotation is respective dip and plunge values associated with individual point data. > >FON_GEO.PAT: > >COLUMN ITEM NAME WIDTH OUTPUT TYPE N.DEC ALTERNATE NAME > 1 AREA 4 12 F 3 > 5 PERIMETER 4 12 F 3 > 9 FON_GEO# 4 5 B - > 13 FON_GEO-ID 4 5 B - > 17 LABL 35 35 C - > 52 PLABL 35 35 C - > 87 SHD 3 3 I - > 90 SHDFIL 3 3 I - > 93 NAME 200 200 C - > > >FON_GEO.AAT: > >COLUMN ITEM NAME WIDTH OUTPUT TYPE N.DEC ALTERNATE NAME > 1 FNODE# 4 5 B - > 5 TNODE# 4 5 B - > 9 LPOLY# 4 5 B - > 13 RPOLY# 4 5 B - > 17 LENGTH 4 12 F 3 > 21 FON_GEO# 4 5 B - > 25 FON_GEO-ID 4 5 B - > 29 LTYPE 35 35 C - > 64 L-SYMB 3 3 I - > > Entity_and_Attribute_Detail_Citation: none Detailed_Description: Entity_Type: Entity_Type_Label: fon_geo.pat Entity_Type_Definition: Geologic units (LABL) and their corresponding names (NAME) identified in the Fontana 7.5' quadrangle Attribute: Attribute_Label: LABL Attribute_Definition: geologic map unit label, in plain text Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Qaf Enumerated_Domain_Value_Definition: Artificial fill Enumerated_Domain: Enumerated_Domain_Value: Qa Enumerated_Domain_Value_Definition: Active alluvial-channel deposits Enumerated_Domain: Enumerated_Domain_Value: Qyfe Enumerated_Domain_Value_Definition: Young alluvial-fan deposits of Etiwanda Creek Enumerated_Domain: Enumerated_Domain_Value: Qyfl Enumerated_Domain_Value_Definition: Young alluvial-fan deposits of Lytle Creek Enumerated_Domain: Enumerated_Domain_Value: Qyfl1 Enumerated_Domain_Value_Definition: Young alluvial-fan deposits of Lytle Creek, unit 1 Enumerated_Domain: Enumerated_Domain_Value: Qya Enumerated_Domain_Value_Definition: Young alluvial-channel deposits Enumerated_Domain: Enumerated_Domain_Value: Qya1 Enumerated_Domain_Value_Definition: Young alluvial-channel deposits, unit 1 Enumerated_Domain: Enumerated_Domain_Value: Qye Enumerated_Domain_Value_Definition: Eolian deposits Enumerated_Domain: Enumerated_Domain_Value: Qof3 Enumerated_Domain_Value_Definition: Old alluvial-fan deposits, unit 3 Enumerated_Domain: Enumerated_Domain_Value: Qof2 Enumerated_Domain_Value_Definition: Old alluvial-fan deposits, unit 2 Enumerated_Domain: Enumerated_Domain_Value: Qof1 Enumerated_Domain_Value_Definition: Old alluvial-fan deposits, unit 1 Enumerated_Domain: Enumerated_Domain_Value: Qvof Enumerated_Domain_Value_Definition: Very old alluvial-fan deposits Enumerated_Domain: Enumerated_Domain_Value: Kg Enumerated_Domain_Value_Definition: Granitic dikes, undifferentiated Enumerated_Domain: Enumerated_Domain_Value: Kgd Enumerated_Domain_Value_Definition: Granodiorite Enumerated_Domain: Enumerated_Domain_Value: Kgd1 Enumerated_Domain_Value_Definition: Granodiorite, unit 1 Enumerated_Domain: Enumerated_Domain_Value: Kt Enumerated_Domain_Value_Definition: Tonalite Enumerated_Domain: Enumerated_Domain_Value: Kt1 Enumerated_Domain_Value_Definition: Tonalite, unit 1 Enumerated_Domain: Enumerated_Domain_Value: Kgdt Enumerated_Domain_Value_Definition: Tonalite and granodiorite, undifferentiated Enumerated_Domain: Enumerated_Domain_Value: Kd Enumerated_Domain_Value_Definition: Diorite Enumerated_Domain: Enumerated_Domain_Value: Kdqd Enumerated_Domain_Value_Definition: Diorite and tonalite, undifferentiated Enumerated_Domain: Enumerated_Domain_Value: Kgb Enumerated_Domain_Value_Definition: Gabbro Enumerated_Domain: Enumerated_Domain_Value: Pzs Enumerated_Domain_Value_Definition: Schist Enumerated_Domain: Enumerated_Domain_Value: Pzm Enumerated_Domain_Value_Definition: Marble Enumerated_Domain: Enumerated_Domain_Value: Pza Enumerated_Domain_Value_Definition: Amphibolite Enumerated_Domain: Enumerated_Domain_Value: KtPzs Enumerated_Domain_Value_Definition: Intermixed heterogenous tonalite and schist Enumerated_Domain: Enumerated_Domain_Value: KtPzm Enumerated_Domain_Value_Definition: Intermixed heterogenous tonalite and marble Enumerated_Domain: Enumerated_Domain_Value: KtPzms Enumerated_Domain_Value_Definition: Intermixed tonalite, marble and schist Attribute: Attribute_Label: LTYPE Attribute_Definition: Description of types of lines on the geologic map (contact, fault, dike). Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: contact, certain Enumerated_Domain_Value: contact, approx. located Enumerated_Domain_Value: map boundary Enumerated_Domain_Value: Kg, granitic dike Detailed_Description: Entity_Type: Entity_Type_Label: fon_str.pat Entity_Type_Definition: Geological point data includes site-specific information describing the types and the orientation of foliation, joints, and lineations. One annotation subclass is included in the geologic points coverage, FON_STR which displays the respective dip and plunge values associated with individual point data. Attribute: Attribute_Label: PTTYPE Attribute_Definition: describes type of point data (foliation, joints, lineations) Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: igneous foliation Enumerated_Domain_Value: vertical igneous foliation Enumerated_Domain_Value: metamorphic foliation Enumerated_Domain_Value: vertical metamorphic foliation Enumerated_Domain_Value: secondary igneous foliation Enumerated_Domain_Value: vertical secondary igneous foliation Enumerated_Domain_Value: igneous lineation Enumerated_Domain_Value: metamorphic lineation Attribute: Attribute_Label: PT-SYMB Attribute_Definition: Coded integer value that relates point to cartographic point symbol in markerset geoscamp2.mrk Attribute: Attribute_Label: STRIKE Attribute_Definition: Azimuthal strike of planar feature Attribute: Attribute_Label: DIP Attribute_Definition: Dip of planar feature Detailed_Description: Entity_Type: Entity_Type_Label: fon_ano.aat Entity_Type_Definition: annotation leaders Attribute: Attribute_Label: L-SYMB Attribute_Definition: Coded integer value (1) that relates arcs to cartographic line symbol in lineset Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Information Services Contact_Address: Address_Type: mailing address Address: Box 25286 Denver Federal Center City: Denver State_or_Province: Colorado Postal_Code: 80225 Country: USA Contact_Voice_Telephone: (303)202-4700 Contact_Facsimile_Telephone: (303)202-4693 Distribution_Liability: The U.S. Geological Survey (USGS) provides these geographic data "as is." The USGS makes no guarantee or warranty concerning the accuracy of information contained in the geographic data. The USGS further makes no warranties, either expressed or implied as to any other matter whatsoever, including, without limitation, the condition of the product, or its fitness for use lies entirely with the user. Although these data have been processed successfully on computers at the USGS, no warranty, expressed or implied, is made by the USGS regarding the use of these data on any other system, nor does the fact of distribution constitute or imply any such warranty. In no event shall the USGS have any liability whatsoever for payment of any consequential, incidental, indirect, special, or tort damages of any kind, including, but not limited to, any loss of profits arising out of use of or reliance on the geographic data or arising out of the delivery, installation, operation, or support by USGS. This digital geologic map database of the Fontana 7.5' quadrangle, 1:24,000 map-scale, and any derivative maps thereof, is not meant to be used or displayed at any scale larger than 1:24,000 (e.g., 1:12,000). Metadata_Reference_Information: Metadata_Date: 20030826 Metadata_Review_Date: 2003092103 Metadata_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Person: Kelly R. Bovard Contact_Position: Geologist Contact_Address: Address_Type: mailing address Address: U.S. Geological Survey Address: Department of Earth Sciences Address: University of California, Riverside City: Riverside State_or_Province: California Postal_Code: 92521 Country: USA Contact_Voice_Telephone: (909) 276-6397 Contact_Facsimile_Telephone: (909) 276-6295 Contact_Electronic_Mail_Address: kbovard@usgs.gov Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998 Metadata_Access_Constraints: none Metadata_Use_Constraints: none