Open-File Report   98–579  Online Version 1.1

**By   F.K. Miller, J.C. Matti, H.J. Brown, and R.E. Powell**

**Digital preparation by Gregory Morton, Steven Kennedy, and P.M. Cossette**

  
Version 1.1         of this Open-File Report contains a digital geologic map and map database         of the Fawnskin 7.5' quadrangle, San Bernardino County, California, that         includes:
- ARC/INFO           (Environmental Systems Research Institute) version 7.2.1 double-precision           coverages of the various elements of the geologic map 
- A PostScript           (.ps) file to plot the geologic map on a topographic base, containing           a Correlation of Map Units diagram and a Description of Map Units 
- Portable           Document Format (.pdf) files of:     This               Readme; includes in Appendix I, data contained in fskn_met.txt
The               same graphic as plotted in 2 above. (Test plots from this .pdf do               not produce 1:24,000-scale maps. Adobe Acrobat page-size settings               control map scale.) 
This release       includes features not found in most other digital geologic maps, in that       all polygons, lines, and points in the coverage are encoded with detailed,       comprehensive geologic data contained in six INFO data tables (.rel). (See       Matti and others, 1998a, 1998b, and 1998c, for information on how the encoding       may be accessed and utilized.) No paper map is included in the Open-File       Report, but a PostScript plot file containing an image of the geologic map       sheet, topographic base, Correlation of Map Units (CMU), and detailed Description       of Map Units (DMU) is. The Correlation of Map Units and Description of Map       Units are in the editorial format of USGS Miscellaneous Investigations Series       maps (I-maps) but have not been edited to comply with I-map standards. Within       the geologic map data package, map units are identified by such standard       geologic-map criteria as formation name, age, and lithology. Even though       this is an author-prepared report, every attempt has been made to closely       adhere to the stratigraphic nomenclature of the U.S. Geological Survey.       Descriptions of units can be obtained by viewing or plotting the .pdf file       (3b above) or plotting the PostScript file (2 above). If roads in some areas,       especially roads that parallel topographic contours, do not show well on       plots of the geologic map, we recommend use of the USGS Fawnskin 7.5' topographic       quadrangle in conjunction with the geologic map.

Learn more   about the Fawnskin   database and its contents

  This illustration       is a .gif nonnavigable image of the USGS geologic-map plot of the Fawnskin       7.5’ quadrangle. A full-size, navigable map can be       plotted from the PostScript file (fskn_map.ps.gz) provided below. Note:       The full-size plot is approximately 32 x 45 inches, requires a large-format       plotter, and is best reproduced at 600 (or greater) dpi.

**File         Name****File         Type and****Description****File         Size******README         and METADATA****readme.pdfDatabase       explanation pamphlet as a formatted PDF file103         Kfskn_met.txtOriginal       metadata text file57         K **DATA**fskn.tar.gzDatabase       package in ARC/INFO 7.x uncompressed export format along with supporting       materials in a compressed UNIX tar file (see the database explanation pamphlet       for details)3.5         MB(9.6 MB        uncompressed)**FILES         for VIEWING and PLOTTING**fskn_map.ps.gzFull-color         geologic map of the Fawnskin quadrangle at 1:24,000 scale on the topographic         base, including a detailed Correlation of Map Units diagram, and an expanded         Description of Map Units, in plottable Postscript format         4.6 MB(19.9 MB        uncompressed)fskn_map.pdfFull-color       geologic map as a formatted PDF file3.3         MBfskn_dmu.pdfDescription       of Map Units as a formatted PDF file44         Kfskn_cmu.pdfCorrelation       of Map Units as a formatted PDF file74         Kpoly_attrib_code.pdfPolygon       Attribute Codes, an alphabetical listing of polygon codes and code explanations,       as a formatted PDF file127         K

Visit the GeoScience   Node of the National Spatial Data Clearinghouse to find other geologic-map   datasets in southern California or elsewhere in the Nation.

Download a free   copy of Adobe Acrobat Reader version 4.0.

For questions about the   content of this report, contact Fred Miller.

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Carolyn Donlin

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| Department   of the Interior | U.S. Geological Survey   | Geologic Division | Western   Regional Geology |