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Region
- Mars (Planet)97
- Georgia12
- Pacific Coast (Calif.)11
- Acidalia Planitia (Mars)8
- Arsia Mons (Mars)7
- Colorado5
- Hellas Planitia (Mars)4
- High Plains Aquifer4
- Missouri4
- Pavonis Mons Region (Mars)4
- Wyoming4
- ArizonaPima County3
- Green River Formation3
- Powder River Basin (Wyo. and Mont.)3
- ArkansasHarrison Region2
- Charles County (Md.)2
- ColoradoMontezuma County2
- Gulf Coast (Tex.)2
- Maine, Gulf of2
- McCormick County (S.C.)2