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Region
- California7
- West Virginia7
- North Pacific Ocean6
- Mars (Planet)5
- Michigan5
- Saturn (Planet)5
- ArizonaMohave County4
- Ontario4
- Powder River Basin (Wyo. and Mont.)4
- CaliforniaSan Mateo County3
- Colorado3
- Idaho3
- Kansas3
- KansasAnderson County3
- Neptune (Planet)3
- Oklahoma3
- Texas3
- Triton (Satellite)3
- Utah3
- AlaskaAlaska Peninsula Region2