Entry_ID: (required) Entry_Title: Geologic Map and Digital Database of the Apache Canyon 7.5' Quadrangle, Ventura and Kern Counties, California Group: Data_Set_Citation Originator(s): Paul A. Stone; Pamela M. Cossette Title: Geologic Map and Digital Database of the Apache Canyon 7.5' Quadrangle, Ventura and Kern Counties, California Publication: U.S. Geological Survey Open-File Report Publication_Date: 2000 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: digital database 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: 34.74998399 Northernmost_Latitude: 34.87499995 Westernmost_Longitude: -119.37509445 Easternmost_Longitude: -119.24990555 End_Group Location: California Location: Ventura County Location: Kern County Location: Apache Canyon Group: Data_Resolution Latitude_Resolution: 0.000001 Longitude_Resolution: 0.000001 End_Group Access_Constraints: None Use_Constraints: The Apache Canyon 7.5' geologic-map database should be used to evaluate and understand the geologic character of the Apache Canyon 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 Apache Canyon 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 Information Services Group: Data_Center_Contact Last_name: U.S. Geological Survey Information Services First_name: N/A Phone: 303-202-4700 Group: Address Box 25286 Denver Federal Center Denver, CO 80225 USA End_Group End_Group End_Group Storage_Medium: SunOS, 5.6, sun4u UNIX ARC/INFO version 7.2.1 Group: Multimedia_Sample URL: http://geopubs.wr.usgs.gov/open-file/of00-359/images/apache.gif Format: JPG Caption: Reduced-size image of the map sheet, 354x411 pixels, 27k bytes End_Group Group: Reference Citation_Information: Originator: Scott C. Minor Publication_Date: 1999 Title: Preliminary geologic map of the San Guillermo Mountain quadrangle, Ventura 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 99-32 Publication_Information: Publication_Place: Denver, Colorado Publisher: U.S. Geological Survey Online_Linkage: End_Group Group: Summary The data set for the Apache Canyon 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. The digital geologic map database for the Apache Canyon quadrangle has been created as a general-purpose data set that is applicable to other land-related investigations in the earth and biological sciences. The Apache Canyon 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 Apache Canyon 7.5' quadrangle, Ventura and Kern Counties, 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, faults and units, (2) a separate coverage layer showing structural data, (3) an additional point coverage which contains bedding data, (4) a point coverage containing sample localities, (5) a scanned topographic base at a scale of 1:24,000, and (6) 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 jpg file (.jpg) 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 List of Map Units, a Correlation of Map Units, and a key to point and line symbols. (2) A .pdf file of a geologic explanation pamphlet that includes a Description of Map Units. (3) Two postScript graphic plot-files: one containing the geologic map on a 1:24,000 topographic base and the other, three accompanying structural cross sections. The geologic map database contains original U.S. Geological Survey data generated by detailed field observation and by interpretation of aerial photographs. The map was created by transferring lines and point data from the aerial photographs to a 1:24,000 topographic base by using a PG-2 plotter. The map was 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: Scott C. Minor Publication_Date: 1999 Title: Preliminary geologic map of the San Guillermo Mountain quadrangle, Ventura 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 99-32 Publication_Information: Publication_Place: Denver, Colorado Publisher: U.S. Geological Survey Online_Linkage: 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 U.S. Geological Survey Room 202 West 904 Riverside Avenue Spokane, Washington 99201-1087 USA End_Group End_Group DIF_Revision_Date: 20000907 Science_Review_Date: