Geological Surveys
| Arizona | The Arizona Geological Survey |
| California | The California Geological Survey |
| Colorado | The Colorado Geological Survey |
| Idaho | The Idaho Geological Survey |
| Montana | Montana Bureau of Mines and Geology |
| Nevada | Nevada Bureau of Mines and Geology |
| New Mexico | New Mexico Bureau of Geology and Mineral Resources |
| Oregon | Oregon Department of Geology & Mineral Industries |
| Utah | Utah Geological Survey |
| Washington | Washington State Department of Natural Resources |
| Wyoming | Wyoming State Geological Survey |
| United
States |
United States Geological Survey |