by Thomas W. Dibblee, Jr. ; edited by John A. Minch. Relief shown by contours and spot heights. "Topographic base maps from available USGS 7.5-minute quadrangles RIVERSIDE WEST, CA 1967, DMA 2551 IV NW -- Series V895, PHOTOREVISED 1980; FONTANA, CA 1967, DMA 2552 III SW -- Series V895." "First printing, August 2004." Includes quadrangle location map, index to adjacent 7.5 minute quadrangles, and index to sources of geology. Includes "pertinent references."