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 Chimney Canyon CA 1967, AMS 1954 II SW - Series V895." "First printing September 2006." "G.C. "Butch" Brown memorial map." Includes quadrangle location map, index to adjacent 7.5 minute quadrangles, and index to sources of geology. Includes "pertinent references", most recent 1991.