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Region
- Mars (Planet)8
- ArizonaMohave County7
- Powder River Basin (Wyo. and Mont.)5
- Cascade Range4
- ArizonaCochise County3
- KansasAnderson County3
- NevadaElko County3
- NevadaLincoln County3
- Oregon3
- South CarolinaCharleston County3
- UtahIron County3
- WyomingAlbany County3
- WyomingPlatte County3
- WyomingUinta County3
- AlaskaAlaska Peninsula Region2
- CaliforniaSan Mateo County2
- Ganymede (Satellite)2
- Idaho2
- Io (Satellite)2
- Michigan2