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Spatial Coverage
- Colorado4
- Dolores County2
- Dolores County.2
- Michigan Basin (Mich. and Ont.)2
- Montezuma County2
- Montezuma County.2
- San Miguel County2
- San Miguel County.2
- Black Canyon of the Gunnison National Monument Region1
- Georgia Embayment1
- Kakwa Falls Region (Alta. and B.C.)1
- Michigan Basin.1
- North America1
- Northeastern States1
- Nova Scotia1
- Ouray Region1
- Sherbrooke1
