Region
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Latin America
1
Louisiana
1
Malaysia
1
Mesabi Range
1
Mexico
1
Middle West
1
Mississippi River Delta (La.)
1
Moab
1
Nashua River (Mass. and N.H.)
1
New York
1
Ontario
1
Santa Monica Bay
1
Santa Monica Bay Region
1
Santa Monica Bay Region (Calif.)
1
Seadrift
1
Seadrift (Tex.)
1
Southwest, New
1
Southwestern States
1
Superior, Lake
1
Sơn Đoòng Cave (Vietnam)
1
Tehri Dam (India)
1
USA
1
United States, West
1
Vietnam
1
Washington (State)
1
West Virginia
1
Whidbey Island
1
Winchester Region
1
États-Unis
1