Collection place
- North America27 objects
- The Americas27 objects
- United States26 objects
- California23 objects
- Northeastern California22 objects
- Northern California22 objects
- Siskiyou County, California10 objects
- Modoc County, California7 objects
- Lava fields, Siskiyou County, California6 objects
- Alpine County, California5 objects
- CA-Alp-29, Hope Valley, Alpine County5 objects
- Hope Valley, Alpine County, California5 objects
- Northern Sierras, Northern California5 objects
- Tule Lake, Siskiyou County, California4 objects
- CA-Mod-44, Modoc County, California3 objects
- Nevada3 objects
- CA-Mod-42, Modoc County, California2 objects
- Hovey Point, Lava fields, Siskiyou County2 objects
- Humboldt County, Nevada2 objects
- NV-Hu-2, Humboldt County, Nevada2 objects