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- West Virginia7
- MontanaPioneer Mountains2
- Ontario2
- Powder River Basin (Wyo. and Mont.)2
- Africa, North1
- Alabama1
- AlaskaAnchorage Region1
- ArizonaMohave County1
- Atlantic Coast (U.S.)1
- Bergen County (N.J.)1
- Blackleaf Formation (Mont.)1
- CaliforniaMontara Mountain Region1
- CaliforniaSan Mateo County1
- Challis National Forest (Idaho)1
- ColoradoPiceance Creek Basin1
- Erie, Lake, Region1
- Eurasia1
- Europe1
- Fishers Island Sound (Conn. and N.Y.)1
- Georgia1