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Region
- Mars (Planet)198
- India192
- United States144
- Georgia116
- China29
- Europe23
- Africa20
- GermanyRhineland20
- Powder River Basin (Wyo. and Mont.)20
- France19
- Delhi (India)17
- MassachusettsStellwagen Bank National Marine Sanctuary17
- Stellwagen Bank National Marine Sanctuary (Mass.)17
- Appalachian Basin16
- California16
- West Virginia16
- ArizonaMohave County15
- Great Britain15
- Maharashtra (India)15
- North America15