Region
Afragola
1
Afragola (Italy)
1
Africa, West
1
Alabama
5
Alaska
9
Anchorage Region
1
Anderson County
1
Antarctica
2
Appalachian Mountains
1
Arapahoe County
1
Arid regions
1
Arizona
4
Arkansas
1
Augusta County
1
Augusta County (Va.)
1
Australia
7
Bangladesh
1
Bay City
1
Bedford County
2
Benton County
1
Benton Lake National Wildlife Refuge
1
Benton Lake National Wildlife Refuge (Mont.)
1
Big Bend National Park
1
Big Horn County
1
Bighorn Basin (Mont. and Wyo.)
1
Black Hills National Forest (S.D. and Wyo.)
1
Bledsoe County
1
Blount County
1
Bootlegger Cove Formation
1
Bootlegger Cove Formation (Alaska)
1
Bradley County
1
California
13
Callaway County
1
Campbell County
1
Canada
4
Canal Zone
1
Caribbean Area
1
Carroll County
1
Carter County
1
Cassia County
1
Cauca (Department)
2
Chambers County
1
Cheatham County
1
Chester County
1
Chihuahuan Desert
1
China
2
Chornobylʹ
1
Claiborne County
1
Clark County
1
Clark County (Wash.)
1
more ...