Geologic map of the Val Verde quadrangle [cartographic material] : Los Angeles and Ventura Counties, California / by Thomas W. Dibblee ; edited by Helmut E. Ehrenspeck.
Relief shown by contours and spot heights. Includes acknowledgments, age correlation chart, quadrangle location map, index to sources of geology, and cross-section diagram. "Prepared in cooperation with the California Department of Conservation, Division of Mines and Geology; and the U.S. Geological Survey."
- Dibblee Geological Foundation
- Held by
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