Region
New Mexico
8
Albuquerque
3
California
3
Florida
3
United States
3
Alabama
2
Columbus
2
Indiana
2
Lake County
2
Louisiana
2
Minnesota
2
New Hampshire
2
Ohio
2
Oklahoma
2
San Juan Basin (N.M. and Colo.)
2
South Carolina
2
Aberdeen Proving Ground
1
Antelope Valley
1
Arizona
1
Arkansas
1
Avra Valley
1
Baton Rouge Region
1
Belvidere
1
Bernalillo County
1
Block Island (Island)
1
Caddo County
1
Caddo Nation of Oklahoma
1
Canadian County
1
Canadian River Valley
1
Catron County
1
Cibola County
1
Colorado
1
Connecticut
1
Connecticut River Watershed
1
Cumberland Valley (Md. and Pa.)
1
Dorchester County
1
Durham
1
Edwards Air Force Base
1
Fond du Lac Indian Reservation
1
Fruitland Formation (Colo. and N.M.)
1
Grand Calumet River (Ind. and Ill.)
1
Great Plains
1
Green River Watershed (Wyo.-Utah)
1
Gulf Coast (U.S.)
1
Hatboro
1
Hattiesburg Region
1
Idaho
1
Illinois
1
Iowa
1
Laurel Region
1
more ...