Geologic map of the Opal Mountain & Lane Mountain 15 minute quadrangles [cartographic material] : San Bernardino County, California / by Thomas W. Dibblee, Jr. ; edited by John A. Minch.
"Topographic base map from available USGS 15-minute quadrangle ... Opal Mountain, CA 1955. AMS 2554 II - Series V795; Lane Mountain, CA 1948, AMS 2654 III - Series V795." "First printing, August 2008." "Gail F. Moulton, Jr. honorary map." Includes location map, index to adjacent 15 minute quadrangles and index to sources of geology, most recent 1960. Relief shown by contours and spot heights. "Contour interval 40 feet."
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