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Region
- Mississippi River Valley3
- MissouriNew Madrid Region3
- New Madrid Seismic Zone3
- New Madrid Region (Mo.)2
- Afghanistan1
- Death Valley (Calif. and Nev.)1
- Europe1
- Green River Watershed (Wyo.-Utah)1
- Mediterranean Region1
- MexicoSonora (State)1
- MichiganMonroe County1
- Morrison Formation1
- NevadaNye County1
- OhioLucas County1
- Powder River Basin (Wyo. and Mont.)1
- Sonora (Mexico : State)1
- Wasatch Formation1