Collection place
- North America45 objects
- The Americas45 objects
- United States45 objects
- California42 objects
- San Francisco Bay Area, California18 objects
- Contra Costa County, California16 objects
- CA-CCo-138, Oakley, Contra Costa County12 objects
- Oakley, Contra Costa County, California12 objects
- Central California10 objects
- South Central California10 objects
- Northern California9 objects
- North Central California7 objects
- Kern County, California4 objects
- Sacramento County, California4 objects
- Southern California4 objects
- Nevada3 objects
- CA-CCo-141, Palm Tract, Contra Costa County2 objects
- CA-CCo-259, Rodeo, Contra Costa County2 objects
- CA-Col-1 (Miller Mound), Colusa County, California2 objects
- CA-Fre-48 (Tranquillity site), Fresno County, California2 objects