Collection place
- North America301 objects
- The Americas301 objects
- United States301 objects
- California256 objects
- Northern California204 objects
- Northeastern California194 objects
- Lassen County, California153 objects
- CA-Las-7, Karlo area, Lassen County152 objects
- Karlo area, Lassen County, California152 objects
- Nevada45 objects
- Humboldt County, Nevada43 objects
- Modoc County, California41 objects
- NV-Hu-301, Humboldt County, Nevada40 objects
- Surprise Valley, Modoc County, California40 objects
- CA-Mod-231, Modoc County, California26 objects
- Eastern California25 objects
- Inyo County, California25 objects
- San Francisco Bay Area, California21 objects
- CA-Iny-372 (Rose Spring site), Inyo County, California16 objects
- Napa County, California16 objects