California 23
Alaska 22
Arizona 21
Nevada 15
North America 13
United States 9
Montana 8
Sierra Nevada (Calif. and Nev.) 8
Colorado 6
Middle Atlantic States 6
Utah 6
West (U.S.) 6
East (U.S.) 4
Texas 4
Virginia 4
Wyoming 4
California, Southern 3
China 3
Colorado River Watershed (Colo.-Mexico) 3
Klamath Mountains (Calif. and Or.) 3
Mexico 3
North Carolina 3
San Juan Basin (N.M. and Colo.) 3
Santa Cruz County 3
Arkansas 2
Atlantic Coast (U.S.) 2
Baboquivari Mountains 2
British Columbia 2
Carlin region 2
Elko County 2
Elko Region 2
Hopewell Region 2
Illinois Basin 2
India 2
Kansas 2
Missouri 2
New Jersey 2
New Mexico 2
New York (State) 2
Northeastern States 2
Pakistan 2
Roskruge Mountains 2
Ruby Range 2
San Andreas Fault (Calif.) 2
San Jose Region 2
Santa Maria Basin 2
Santa Rita Mountains 2
Sierrita Mountains 2
Southwest, New 2
Washington (State) 2
Wrangell Mountains 2
Africa 1
Alaska Peninsula 1
Alps 1
Anchorage 1
Anchorage Region 1
Andrus Canyon 1
Asia, Central 1
Atlantic Coast 1
Atlantic Provinces 1
Australia 1
Baja California (Peninsula) 1
Canada 1
Canelo Hills 1
Chelan County 1
Chesapeake and Ohio Canal National Historical Park 1
Coast Ranges 1
Cochise County 1
Colfax County 1
Colorado River Region (Colo.-Mexico) 1
Comobabi Mountains 1
Dakota Territory 1
De Long Mountains 1
Eurasia 1
Florida 1
Fort Belknap Indian Reservation 1
Four Corners Region 1
Frontier Formation 1
Greenland 1
Huachuca Mountains 1
Humboldt Range 1
Idaho 1
Imperial County 1
Inyo County 1
Katmai National Park and Preserve Region 1
Kohat District 1
Liaoning Sheng 1
Lubbock Region 1
Manitoba 1
Maritime Provinces 1
Massachusetts 1
Mediterranean Region 1
Mexico, North 1
Michigan Basin (Mich. and Ont.) 1
Middle West 1
Misheguk Mountain 1
Mississippi County 1
Mississippi Embayment 1
Mohave County 1
Moon 1