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Spatial Coverage
- U.S.[remove]8
- California2
- Culpeper Basin (Va. and Md.)2
- San Mateo County2
- San Mateo County (Calif.)2
- Arizona1
- Cochise County1
- Graham County1
- Grant County1
- Greenlee County1
- Hidalgo County1
- Kaiparowits Plateau Region1
- Kaiparowits Plateau Region (Utah)1
- Luna County1
- Maryland1
- Massachusetts1
- Massachusetts.1
- Nevada1
- New Mexico1
- Nye County1
