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Collection place
- North America30
- The Americas30
- United States30
- California28
- San Francisco Bay Area, California22
- Alameda County, California8
- North Central California6
- Northern California6
- CA-Ala-329 (Ryan Mound), Coyote Hills, Fremont5
- Fremont, Alameda County, California5
- CA-Sol-13, Solano County, California4
- Contra Costa County, California4
- Cross Slough, Solano County, California4
- Solano County, California4
- Unincorporated western Contra Costa County, California4
- CA-CCo-151, El Sobrante, Contra Costa County3
- CA-SCl-1 (Ponce Mound), Mountain View, Santa Clara County3
- CA-Sac-60 (Hicks 1), Sacramento County, California3
- CA-Sac-60 or 61 (Hicks site), Sacramento County, California3
- El Sobrante, Contra Costa County, California3