Entry_ID: (required) Entry_Title: Geologic map of the Fawnskin 7.5' quadrangle, San Bernardino County, California Group: Data_Set_Citation Originator(s): F.K. Miller; J.C. Matti; H.J. Brown; R.E. Powell Title: Geologic map of the Fawnskin 7.5' quadrangle, San Bernardino County, California Publication: U.S. Geological Survey Open-File Report Publication_Date: 1998 Publication_Place: Menlo Park, California Publisher: U.S. Geological Survey Edition: Version 1.1 Data_Presentation_Form: vector digital data URL: http://geopubs.wr.usgs.gov/open-file/of98-579/ End_Group Keyword: geologic map Keyword: geology Keyword: bedrock geology Keyword: surficial geology Keyword: Triassic monzonite Keyword: Cataclasite Keyword: Young faults Keyword: Paleozoic carbonate rock Keyword: Cretaceous granitic rocks Keyword: Jurassic granitic rocks Group: Temporal_Coverage Start_date: 19750701 Stop_date: 199610 End_Group Data_Set_Progress: Complete Group: Spatial_Coverage Southernmost_Latitude: 34.24998406 Northernmost_Latitude: 34.37499993 Westernmost_Longitude: -117.00009271 Easternmost_Longitude: -116.87490735 End_Group Location: California Location: San Bernardino County Location: San Bernardino Mountains Location: Fawnskin 7.5' quadrangle Group: Data_Resolution Latitude_Resolution: 0.0027669090777 Longitude_Resolution: 0.0027669090777 End_Group Access_Constraints: None Use_Constraints: The Fawnskin 7.5' geologic-map database should be used to evaluate and understand the geologic character of the Fawnskin 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 geologic materials and structures. However, it is not sufficiently detailed for site-specific determinations. 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. Originating_Center: (required) Group: Data_Center Data_Center_Name: U.S. Geological Survey Information Services Dataset_ID: US Geological Survey Open-File Report 98-0579 Group: Data_Center_Contact Last_name: U.S. Geological Survey Information Services First_name: N/A Phone: 1-888-ASK-USGS Phone: 303-202-4700 Group: Address Box 25286, Denver Federal Center Denver, Colorado 80255-0046 USA End_Group End_Group End_Group Storage_Medium: SunOS, 5.6, sun4u UNIX ARC/INFO version 7.2.1 Group: Distribution Distribution_Media: online Distribution_Format : ArcInfo export Distribution_Size: 3.5 megabytes Fees: none End_Group Group: Multimedia_Sample URL: http://geopubs.wr.usgs.gov/open-file/of98-579/images/fskn.gif Format: GIF Group: Description Non-navigable .gif image of the geologic map, topographic base, Correlation of Map Units, Description of Map Units and key to point and line symbols. End_Group End_Group Group: Multimedia_Sample URL: http://geopubs.wr.usgs.gov/open-file/of98-579/fskn_map.pdf Format: Portable document format, .pdf Group: Description Navigable portable document file (.pdf) image of the geologic map, topographic base, Correlation of Map Units, Description of Map Units and key to point and line symbols. End_Group End_Group Group: Reference Citation_Information: Originator: Fred K. Miller Originator: Jonathan C. Matti Originator: Howard J. Brown Publication_Date: 2000301 Title: Digital geologic map of the Butler Peak 7.5' quadrangle, San Bernardino County, 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: 00-145 Publication_Information: Publication_Place: Menlo Park, California Publisher: U.S. Geological Survey Online_Linkage: http://geopubs.wr.usgs.gov/open-file/of00-145 End_Group Group: Summary The data set for the Fawnskin quadrangle has been prepared by the Southern California Areal Mapping Project (SCAMP), a cooperative project sponsored jointly by the U.S. Geological Survey and the California Division of Mines and Geology, as part of an ongoing effort to utilize a Geographical Information System (GIS) format to create a regional digital geologic database for southern California. This regional database is being developed as a contribution to the National Geologic Map Data Base of the National Cooperative Geologic Mapping Program ofthe USGS. Development of the data set for the Fawnskin quadrangle has also been supported by the U.S. Forest Service, San Bernardino National Forest. The digital geologic map database for the Fawnskin quadrangle has been created as a general-purpose data set that is applicable to other land-related investigations in the earth and biological sciences. For example, the U.S. Forest Service, San Bernardino National Forest, is using the database as part of a study of an endangered plant species, California Buckwheat, that shows preference for particular rock types. The Fawnskin database is not suitable for site-specific geologic evaluations at scales greater than 1:24,000 (1 in = 2,000 ft). This data set maps and describes the geology of the Fawnskin 7.5' quadrangle, San Bernardino County, California and contains original U.S. Geological Survey data generated by detailed field observation and by interpretation of aerial photographs. The geologic map covers part of the northern San Bernardino Mountains. Bedrock units in the San Bernardino Mountains are dominated by large Cretaceous and Jurassic granitic bodies ranging in composition from monzogranite to gabbro, and include lesser Triassic monzonite. These granitic rocks intrude highly faulted and folded Late Proterozoic and Paleozoic formations representative of those found in the southern Great Basin. Low-angle thrust faults, many of them complexly folded, cut the Late Proterozoic and Paleozoic formations. A large, deformed cataclastic zone in the western part of the quadrangle cuts pre-Late Cretaceous units, and is intruded by Late Cretaceous plutons. Spanning the Pleistocene in age, large alluvial fans flank the north side of the mountains, and are dominated by debris flow deposits. Young, south dipping reverse faults, some with moderately to well eroded fault scarps, discontinuously flank the northern edge of the mountains. Young and old high-angle faults are mapped within the range. Created using Environmental Systems Research Institute's ARC/INFO software, the database consists of the following items: (1) a map coverage containing faults, geologic contacts and units, (2) a coverage showing structural point data, (3) a coverage containing linear structural data, (4) a coverage showing geologic line ornamentation and (5) six additional INFO data tables (.rel) that contain detailed, coded, geologic information such as texture, fabric, color, and mineralogy,. These additional data are accessible to the user through the utilization of ARC/INFO relate environments and provide the user access to as much or as little of the encoded data as required. In addition, the data set includes the following graphic and text products: (1) A PostScript graphic plot-file containing the geologic map, topography, cultural data, a Correlation of Map Units (CMU) diagram, a Description of Map Units (DMU), and a key for point and line symbols; (2) PDF files of this Readme (including the metadata file as an appendix), Description of Map Units (DMU), and a screen graphic of the plot produced by the PostScript plot file. The geologic map database contains original U.S. Geological Survey data generated by detailed field observation and by interpretation of aerial photographs. Within the database, geologic contacts are represented as lines (arcs), geologic units as polygons, and site-specific data as points. Polygon, arc, and point attribute tables (.pat, .aat, and .pat, respectively) uniquely identify each geologic datum. Version 1.1 of this digital release differs from Version 1.0 mainly by changes and additions to conform to the more recently released digital geologic map of the Butler Peak quadrangle (OF 00-145), which adjoins the Fawnskin quadrangle on the west. Along the western edge of the quadrangle several polygons of Quaternary units are added and the names of several are changed. Colors of some granitic units are changed to conform to colors assigned to the same units in the Butler Peak quadrangle. Within the geologic map database, map units are identified by standard geologic map criteria such as formation-name, age, and lithology. The authors have attempted to adhere to the stratigraphic nomenclature of the U.S. Geological Survey and the North American Stratigraphic Code, but the database has not received a formal editorial review of geologic names. Geologic map unit labels entered in database items LABL and PLABL contain substitute characters for conventional stratigraphic age symbols: Cambrian appears as 'C' in LABL and as '_' in PLABL, Mesozoic appears as 'Mz' in LABL and as '}' in PLABL, Pennsylvanian as 'P' in LABL and as '&' in PLABL, Triassic appears as 'Tr' in LABL and as '^' in PLABL, and Proterozoic appears as 'Pr' in LABl and as '<' in PLABL. The substitute characters in PLABL invoke their corresponding symbols from the GeoAge font group to generate map unit labels with conventional stratigraphic symbols. End_Group Group: Related_URL URL_Type: URL: http://geopubs.wr.usgs.gov/open-file/of00-145 Group: Description Originator: Fred K. Miller Originator: Jonathan C. Matti Originator: Howard J. Brown Publication_Date: 2000301 Title: Digital geologic map of the Butler Peak 7.5' quadrangle, San Bernardino County, 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: 00-145 Publication_Information: Publication_Place: Menlo Park, California Publisher: U.S. Geological Survey Online_Linkage: http://geopubs.wr.usgs.gov/open-file/of00-145 End_Group End_Group Group: DIF_Author Last_name: Cossette First_name: Pamela Middle_name: M. Email: pcossette@usgs.gov Phone: (509) 368-3123 Group: Address 904 West Riverside Avenue, Rm. 202 Spokane, WA 99201-1087 USA End_Group End_Group DIF_Revision_Date: 20010613 Science_Review_Date: