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.pdf	Database explanation pamphlet as a formatted PDF file		103 K
fskn_met.txt	Original metadata text file		57 K
DATA
fskn.tar.gz	Database 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.gz	Full-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.pdf	Full-color geologic map as a formatted PDF file		3.3 MB
fskn_dmu.pdf	Description of Map Units as a formatted PDF file		44 K
fskn_cmu.pdf	Correlation of Map Units as a formatted PDF file		74 K
poly_attrib_code.pdf	Polygon Attribute Codes, an alphabetical listing of polygon codes and code explanations, as a formatted PDF file		127 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.

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