Collection place
- Napa County, California991 objects
- Surprise Valley, Modoc County, California951 objects
- Southeastern United States858 objects
- Placer County, California854 objects
- Central California793 objects
- South Central California751 objects
- Churchill County, Nevada723 objects
- CA-Mod-204, Modoc County, California718 objects
- Siskiyou County, California628 objects
- Fresno County, California614 objects
- CA-Sac-2 or 3 or 6 ('Johnson Mound'), Sacramento County, California570 objects
- CA-Sac-6, Sacramento County, California570 objects
- Martis Valley, Placer County, California560 objects
- Eagle Lake, Lassen County, California536 objects
- Southern California528 objects
- Napa Valley, Napa County, California501 objects
- Northwestern California452 objects
- Lava fields, Siskiyou County, California444 objects
- CA-Sis-7, Lava fields, Siskiyou County436 objects
- Canby's Cross, Lava fields, Siskiyou County436 objects