Collection place
- North America114 objects
- The Americas114 objects
- United States114 objects
- California105 objects
- Northeastern California103 objects
- Northern California103 objects
- Modoc County, California82 objects
- Surprise Valley, Modoc County, California80 objects
- CA-Mod-204, Modoc County, California51 objects
- Lassen County, California21 objects
- Surprise Valley, Lassen County, California21 objects
- CA-Las-201, Surprise Valley, Lassen County14 objects
- CA-Mod-197, Modoc County, California11 objects
- Nevada9 objects
- CA-Mod-199, Modoc County, California6 objects
- CA-Las-194, Surprise Valley, Lassen County5 objects
- CA-Mod-201, Modoc County, California5 objects
- Humboldt County, Nevada5 objects
- NV-Hu X-2 (1967), Humboldt County, Nevada5 objects
- Churchill County, Nevada3 objects