Region
California
3
Nevada
2
Beaufort Sea
1
Boulder County
1
Colorado
1
Fremont County
1
Idaho
1
Jefferson County
1
Livermore Valley
1
Mexico, Gulf of
1
New England
1
New Hampshire
1
Northwest, Pacific
1
Owens Lake (Inyo County)
1
Santa Clara Valley
1
Snake River (Wyo.-Wash.)
1
Snake River Plain (Idaho and Or.)
1
Sublette County
1
Wind River Range (Wyo.)
1
Wyoming
1
Yucca Mountain Region
1