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Collection place
- North America141
- The Americas[remove]141
- United States133
- California79
- Northern California56
- North Central California52
- Northwestern United States47
- Alaska41
- Sacramento County, California34
- Daxatkanada, Sitka Borough, Alaska27
- Sitka Borough, Alaska27
- San Francisco Bay Area, California21
- Contra Costa County, California16
- San Joaquin County, California16
- CA-Sac-2 or 3 or 6 ('Johnson Mound'), Sacramento County, California11
- CA-Sac-6, Sacramento County, California11
- CA-SJo-68, San Joaquin County, California10
- CA-Sac-21 (Hollister Mound), Sacramento County, California10
- Unincorporated eastern Contra Costa County, California9
- CA-CCo-141, Palm Tract, Contra Costa County8