Collection place
- Unincorporated western Contra Costa County, California4 objects
- Brooks Island, Richmond, Contra Costa County3 objects
- CA-CCo-262, Pinole, Contra Costa County3 objects
- CA-CCo-285, Richmond, Contra Costa County3 objects
- Rodeo, Contra Costa County, California3 objects
- Buttonwillow area, Kern County, California2 objects
- Buttonwillow, Kern County, California2 objects
- CA-Ala-336, Newark, Alameda County2 objects
- CA-CCo-259, Rodeo, Contra Costa County2 objects
- CA-CCo-260, Pinole, Contra Costa County2 objects
- CA-CCo-288, Richmond, Contra Costa County2 objects
- CA-CCo-290, Brooks Island, Richmond2 objects
- CA-ElD-16 (Hawver Cave), El Dorado County, California2 objects
- CA-Ker-49, Kern County, California2 objects
- CA-Mrn-137, Marin County, California2 objects
- CA-Mrn-169, Marin County, California2 objects
- Concord, Contra Costa County, California2 objects
- Cordelia, Solano County, California2 objects
- El Dorado County, California2 objects
- Green Valley, Solano County, California2 objects