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Region
- Mars (Planet)97
- United States11
- Acidalia Planitia (Mars)8
- Georgia8
- Arsia Mons (Mars)7
- Hellas Planitia (Mars)4
- Iraq4
- Missouri4
- Pavonis Mons Region (Mars)4
- Wyoming4
- Colorado3
- Green River Formation3
- Powder River Basin (Wyo. and Mont.)3
- America2
- ArkansasHarrison Region2
- Chhattīsgarh (India)2
- ColoradoMontezuma County2
- High Plains Aquifer2
- AlaskaBethel Region1
- Antarctica1