by Thomas W. Dibblee, Jr. ; edited by John A. Minch. Relief shown by contours and spot heights. "Topographic base map from available USGS 7.5-minute quadrangle Midway CA 1953. Photorevised 1980. DMA 1659 II NE, series V895. Tracy CA 1954. Photorevised 1981. DMA 1759 III NW, series V895." "First printing, July 2006." Includes quadrangle location map, index to adjacent 7.5 minute quadrangles, and index to sources of geology. Includes "pertinent references."