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Spatial Coverage
- Placer County (Calif.)1
- Saint George Basin.1
- Sevier County (Utah)1
- Sonora (Mexico : State)1
- Southern California Bight (Calif. and Mexico)1
- Stillwater County (Mont.)1
- Sweet Grass County (Mont.)1
- Uintah County (Utah)1
- Vail Pass (Summit County and Eagle County, Colo.)1
- Washington (State)1
- Yavapai County (Ariz.)1
- Yuba County (Calif.)1
