Region
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Italy
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Jefferson County
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Los Angeles (Calif.)
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Mississippi
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Singapore
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Soviet Union
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Starved Rock State Park (Ill.)
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Vermont
4
Alberta
3
America
3
Apostle Islands National Lakeshore
3
Apostle Islands National Lakeshore (Wis.)
3
Arnhem Land (N.T.)
3
Bass Rock (Scotland)
3
Bethel (Town)
3
Caribbean Area
3
Caribou County
3
Clearwater County
3
Cochise County
3
Colombia
3
Columbia Plateau
3
Connecticut
3
Cuba
3
Fort Berthold Indian Reservation (N.D.)
3
Grande-Bretagne
3
Great Lakes Region (North America)
3
Great Plains
3
Idaho Batholith
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Idaho Batholith (Idaho and Mont.)
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Maine
3
Maryland
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Middle East
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Middle West
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Mississippi River
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Missouri River Watershed
3
Nashville
3
New Hampshire
3
Northern Territory
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Norway
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Ohio River Valley
3
Pennsylvania
3
Plymouth Rock (Plymouth, Mass.)
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Red Rock Canyon National Conservation Area (Nev.)
3
Rock Island County
3
Rock Island County (Ill.)
3
Sierra Nevada
3
South Mountains
3
South Mountains (Ariz.)
3
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