Geologic map of the Walnut Creek quadrangle, Contra Costa County, California [cartographic material] / by Thomas W. Dibblee, Jr. ; edited by John A. Minch.
Relief shown by contours and spot heights. "The field work for this map was completed as Open File Report OF-80-351 while Tom Dibblee was with the U.S. Geological Survey. When appropriate this map has recently been updated and revised by Tom." "Topographic base map from available USGS 7.5-minute quadrangle WALNUT CREEK, CA 1995, NIMA 1559 I NE - Series V895." "First printing, February 2005." Includes quadrangle location map, index to adjacent 7.5 minute quadrangles, and index to sources of geology.
- Santa Barbara Museum of Natural History
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