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Spatial Coverage
- California3
- Wyoming3
- Fort Union Formation.2
- Wisconsin2
- Arizona1
- Bighorn River Watershed (Wyo. and Mont.)1
- Carbon County1
- Carbon County.1
- Colorado1
- Death Valley Region (Calif. and Nev.)1
- Fremont County1
- Funeral Mountains Wilderness1
- Inyo County1
- Mississippi River Valley1
- Mississippi River Valley.1
- Missouri1
- Montrose County1
- New Mexico1
- Oconto County1
- Ontario1
