Region
United States
29
Louisiana
16
China
13
Italy
12
Michigan
12
Texas
12
Mississippi
10
Florida
9
New Jersey
9
Georgia
7
Arkansas
6
California
6
Japan
6
Massachusetts
6
Africa
5
Canada, Northern
5
India
5
Maryland
5
Mexico
5
New Hampshire
5
Alps
4
Brazil
4
Germany
4
Glynn County
4
Idaho
4
Kentucky
4
Nevada
4
Northwest Territories
4
Ohio
4
San Juan Basin
4
San Juan Basin (N.M. and Colo.)
4
Soviet Union
4
Virginia
4
Arctic Regions
3
Arizona
3
Clay County
3
Colorado
3
Craighead County
3
Delaware
3
Denmark
3
Earth (Planet)
3
Floridan Aquifer
3
Greene County
3
Houston
3
Israel
3
Jefferson County
3
Judaea, Wilderness of
3
Judean Desert
3
Korea (South)
3
Lower Kennebec River Basin
3
more ...