https://www.usgs.gov/publications/preliminary-geologic-map-san-guillermo-mountain-quadrangle-ventura-county-california
Preliminary geologic map of the San Guillermo Mountain Quadrangle, Ventura County, California |...
New 1:24,000-scale geologic mapping in the Cuyama 30' x 60' quadrangle, in support of the USGS Southern California Areal Mapping Project (SCAMP), is...
geologic mapof thesan guillermo