Region
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San Pedro River Valley (Mexico and Ariz.)
3
Siberia
3
South Carolina
3
West Virginia
3
Africa, East
2
Africa, Southern
2
Araripe Plateau
2
Arches National Park (Utah)
2
Argentina
2
Atlantic Coast
2
Atlantic Coast (U.S.)
2
Big Bone
2
Big Bone (Ky.)
2
Black Canyon of the Gunnison National Park (Colo.)
2
Bolivia
2
Brooks Range
2
Bryce Canyon National Park (Utah)
2
Burgess Shale (B.C.)
2
Canyonlands National Park (Utah)
2
Capitol Reef National Park (Utah)
2
Caribbean Area
2
Cedar Breaks National Monument (Utah)
2
Charleston
2
Cincinnati Region
2
City of Rocks National Reserve (Idaho)
2
Colorado National Monument (Colo.)
2
Curecanti National Recreation Area (Colo.)
2
Dinosaur National Monument (Colo. and Utah)
2
Earth (Planet)
2
Enewetak Atoll (Marshall Islands)
2
Florissant Fossil Beds National Monument
2
Fossil Butte National Monument
2
France
2
Fresno County
2
Golden Spike National Historic Site (Utah)
2
Grande Prairie (Alta.)
2
Greenland
2
Gulf Coast (U.S.)
2
Helena
2
Hovenweep National Monument (Utah and Colo.)
2
Hydra Island
2
Indonesia
2
Islands of the Pacific
2
Latin America
2
Long Island
2
Middle Atlantic States
2
Midway Islands
2
Natural Bridges National Monument (Utah)
2
North Atlantic Ocean
2
Northwest, Pacific
2
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