Region
United States
9
Antarctica
2
Alaska
1
Alps
1
Asia
1
Atlantic Ocean
1
Baffin Island
1
Canada, Northern
1
Capitan Formation (N.M. and Tex.)
1
Davis Strait
1
England
1
Europe
1
Ghana
1
Great Britain
1
Greece
1
Haiti
1
Michigan
1
Moon
1
New Mexico
1
Nunavut
1
Oceania
1
Oklahoma
1
Olduvai Gorge
1
Pyrenees
1
Rocky Mountains
1
Scarborough (England)
1
Tanzania
1
Tropics
1
Upper Peninsula
1
Utah
1
West Indies
1