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- Powder River Basin (Wyo. and Mont.)2
- Alabama1
- ArizonaMohave County1
- CaliforniaMontara Mountain Region1
- CaliforniaSan Mateo County1
- Challis National Forest (Idaho)1
- ColoradoPiceance Creek Basin1
- Georgia1
- Idaho National Engineering Laboratory Region1
- IdahoChallis National Forest1
- IdahoIdaho National Laboratory Region1
- Klamath Mountains (Calif. and Or.)1
- Mars (Planet)1
- MontanaBeaverhead County1
- MontanaPioneer Mountains1
- Montara Mountain Region (Calif.)1
- NevadaLincoln County1
- NevadaNye County1
- NevadaPershing County1
- NevadaSeaman Range1