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Spatial Coverage
- Colorado6
- Kansas6
- San Juan Basin (N.M. and Colo.)6
- Great Basin3
- Montana3
- Ozark Mountains Region3
- Adams County2
- Black Hills (S.D. and Wyo.)2
- High Plains Aquifer2
- Morrison Formation2
- Nevada2
- Texas2
- Weld County2
- Alamosa River (Colo.)1
- American Samoa1
- Appalachian Region1
- Arizona1
- Barnstable County1
- Bay County1
- Bexar County1
