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Collection place
- North America1,810
- The Americas1,810
- United States[remove]1,810
- California1,165
- San Francisco Bay Area, California649
- Nevada501
- Northern California414
- CA-SMa-151 (Phleger Mound), Princeton, San Mateo County385
- Half Moon Bay, San Mateo County, California385
- Princeton, San Mateo County, California385
- San Mateo County, California385
- Northeastern California312
- CA-Las-194, Surprise Valley, Lassen County278
- Lassen County, California278
- Surprise Valley, Lassen County, California278
- Napa County, California199
- Churchill County, Nevada174
- Napa Valley, Napa County, California134
- Middle Napa Valley, Napa County, California128
- Duck Flat area, Washoe County, Nevada118