Skip Links

USGS - science for a changing world

Open-File Report 95-699

Preliminary Geologic Map of the Val Verde 7.5' Quadrangle, Southern California: A Digital Database

By R. F. Yerkes and R. H. Campbell

Thumbnail of and link to report PDF (880 kB)Introduction

This Open-File report is a digital geologic map database. A pamphlet serves to introduce and describe the digital data. There is no paper map included in the Open-File report.

This digital map database is compiled from previously published sources combined with some new mapping and modifications in nomenclature. The geologic map database delineates map units that are identified by general age and lithology following the stratigraphic nomenclature of the U. S. Geological Survey. For detailed descriptions of the units, their stratigraphic relations and sources of geologic mapping consult Yerkes and Campbell (1995). More specific information about the units may be available in the original sources.

Updated October 19, 2009

  • All database files TAR.GZ (25.5 MB)
    Includes all the geologic map database layers listed below, in ARC/INFO 7.x ASCII EXPORT format; and all of the documentation files, packaged in a single UNIX tar file, compressed with gzip

For additional information, contact:
Geology, Minerals, Energy, and Geophysics Science Center
U.S. Geological Survey
345 Middlefield Road, MS 901
Menlo Park, CA 94025-3591

Part or all of this report is presented in Portable Document Format (PDF). For best results viewing and printing PDF documents, it is recommended that you download the documents to your computer and open them with Adobe Reader. PDF documents opened from your browser may not display or print as intended. Download the latest version of Adobe Reader, free of charge.

Suggested citation:

Yerkes, R. F., Campbell, Russell H., 1995, Preliminary Geologic Map of the Val Verde 7.5' Quadrangle, Southern California: A Digital Database: U. S. Geological Survey Open-File Report 95-699, 8 pp.,

Accessibility FOIA Privacy Policies and Notices logo U.S. Department of the Interior | U.S. Geological Survey
Page Contact Information: Contact USGS
Page Last Modified: Wednesday, December 07, 2016, 04:01:51 PM