Entry_ID: (required) Entry_Title: Geologic Map and Digital Database of the Cougar Buttes 7.5' Quadrangle, San Bernardino County, California Group: Data_Set_Citation Originator(s): Geologic Information: Robert E. Powell; Geologic Information: Jonathan C. Matti; Digital Database: Pamela M. Cossette Title: Geologic Map and Digital Database of the Cougar Buttes 7.5' Quadrangle, San Bernardino County, California Publication: U.S. Geological Survey Open-File Report Publication_Date: 2000301 Publication_Place: Menlo Park, California Publisher: U.S. Geological Survey Edition: Version 1.0 Data_Presentation_Form: vector digital data URL: End_Group Keyword: geologic map Keyword: geology Keyword: surficial geology Keyword: bedrock geology Group: Temporal_Coverage Start_date: 2000 Stop_date: 2000 End_Group Data_Set_Progress: Complete Group: Spatial_Coverage Southernmost_Latitude: 34.37498407 Northernmost_Latitude: 34.49999995 Westernmost_Longitude: -116.87509313 Easternmost_Longitude: -116.74990687 End_Group Location: California Location: San Bernardino County Location: Cougar Buttes 7.5' quadrangle Group: Data_Resolution Latitude_Resolution: 0.0000001 Longitude_Resolution: 0.0000001 End_Group Access_Constraints: None Use_Constraints: The Cougar Buttes 7.5' geologic-map database should be used to evaluate and understand the geologic character of the Cougar Buttes 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. However, it is not sufficiently detailed for site-specific determinations or evaluations of those features. Faults shown do not take the place of fault-rupture hazard zones designated by the California State Geologist (see Hart, 1988). Use of the Cougar Buttes 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 any derivative maps, the detail and accuracy issues inherent in map scale limitations are also present in the digital data. The fact that this database was edited at a scale of 1:24,000 means that higher-resolution data generally are 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 beyond the intended resolution of the database. Similarly, although higher-resolution data is incorporated at a few places, the resolution of the combined output will be limited by the lower-resolution data. This report is preliminary and has not been reviewed for conformity with U.S. Geological Survey editorial standards or with the North American Stratigraphic Code. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. Hart, E. W., 1988, Fault-rupture zones in California; Alquist-Priolo Special Studies Zones Act of 1972 with index to special studies zones maps: California Division of Mines and Geology Special Publication 42 Originating_Center: (required) Group: Data_Center Data_Center_Name: U.S. Geological Survey Group: Data_Center_Contact Last_name: Powell First_name: Robert Middle_name: E. Email: rpowell@usgs.gov Phone: 509 368-3120 Group: Address U.S. Geological Survey Room 202 West 904 Riverside Avenue Spokane, WA 99201-1007 USA End_Group End_Group End_Group Storage_Medium: SunOS, 5.6, sun4u UNIX ARC/INFO version 7.2.1 Group: Multimedia_Sample URL: Format: jpg Group: Description The browse graphic file contains a navigable 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 Originator: Robert E. Powell Publication_Date: 1998 Title: Geologic map of the Fawnskin 7.5' quadrangle, San Bernardino County, California, version 1.0 Geospatial_Data_Presentation_Form: map Series_Information: Series_Name: U.S. Geological Survey Open-File Report Issue_Identification: USGS OFR 98-579 Publication_Information: Publication_Place: Menlo Park, California Publisher: U.S. Geological Survey Online_Linkage: End_Group Group: Summary The data set for the Cougar Buttes 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 of the USGS. Development of the data set for the Cougar Buttes quadrangle has also been supported by the Mojave Water Agency and U.S. Forest Service, San Bernardino National Forest. The digital geologic map database for the Cougar Buttes quadrangle has been created as a general-purpose data set that is applicable to other land-related investigations in the earth and biological sciences. In cooperation with the Water Resources Division of the U.S. Geological Survey, we have used our mapping in the Cougar Buttes and adjoining quadrangles together with well log data to develop a hydrogeologic framework for the basin. In an effort to understand surficial processes and to provide a base suitable for ecosystem assessment, we have differentiated surficial veneers on piedmont and pediment surfaces and distinguished the various substrates found beneath these veneers. Currently, the geologic database for the Cougar Buttes quadrangle is being applied in groundwater investigations in the Lucerne Valley basin (USGS, Water Resources Division), in biological species studies of the Cushenbury Canyon area (U.S. Forest Service, San Bernardino National Forest), and in the study of soils on various Quaternary landscape surfaces on the north piedmont of the San Bernardino Mountains (University of New Mexico). The Cougar Buttes 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 Cougar Buttes 7.5' quadrangle, San Bernardino County, California. Created using Environmental Systems Research Institute's ARC/INFO software, the data base consists of the following items: (1) a map coverage showing geologic contacts and units, (2) a separate coverage layer showing structural data, (3) a scanned topographic base at a scale of 1:24,000, and (4) attribute tables for geologic units (polygons), contacts (arcs), and site-specific data (points). The data base is accompanied by a readme file and this metadata file. In addition, the data set includes the following graphic and text products: (1) A portable document file (.pdf) containing a browse-graphic of the geologic map on a 1:24,000 topographic base. The map is accompanied by a marginal explanation consisting of a Description of Map Units (DMU), a Correlation of Map Units (CMU), and a key to point and line symbols. (2) Separate .pdf files of the DMU and CMU, individually. (3) A PostScript graphic plot-file containing the geologic map on a 1:24,000 topographic base accompanied by the marginal explanation. (4) A pamphlet that summarizes the late Cenozoic geology of the Cougar Buttes quadrangle. The geologic map data base contains original U.S. Geological Survey data generated by detailed field observation and by interpretation of aerial photographs, including low-altitude color and black-and-white photographs and high-altitude infrared photographs. The map was created by transferring lines from the aerial photographs to a 1:24,000 topographic base via a mylar orthophoto-quadrangle or by using a PG-2 plotter. The map was then scribed, scanned, and imported into ARC/INFO, where the database was built. 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 and link it to other tables (.rel) that provide more detailed geologic information. End_Group Group: Related_URL URL_Type: URL: Group: Description Originator: Fred K. Miller Originator: Jonathan C. Matti Originator: Howard J. Brown Originator: Robert E. Powell Publication_Date: 1998 Title: Geologic map of the Fawnskin 7.5' quadrangle, San Bernardino County, California, version 1.0 Geospatial_Data_Presentation_Form: map Series_Information: Series_Name: U.S. Geological Survey Open-File Report Issue_Identification: USGS OFR 98-579 Publication_Information: Publication_Place: Menlo Park, California Publisher: U.S. Geological Survey Online_Linkage: End_Group End_Group Group: DIF_Author Last_name: Powell First_name: Robert Middle_name: E. Email: rpowell@usgs.gov Phone: (509) 368-3120 Group: Address 904 West Riverside Avenue, Rm. 202 Spokane, WA 99201-1087 USA End_Group End_Group DIF_Revision_Date: 20000727 Science_Review_Date: