Region
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Colville River Delta
2
Daqing (Heilongjiang Sheng, China)
2
Egypt
2
Ejido de Emiliano Zapata
2
Former Soviet republics
2
Gulf States
2
Gulf of Mexico
2
Hormuz, Strait of
2
Indian Territory
2
Islamic countries
2
Italy
2
Kansas
2
Karkūk
2
Karkūk (Iraq)
2
Kazakhstan
2
Lebanon
2
Mediterranean region
2
Mississippi
2
New Mexico
2
New York (State)
2
North Slope (Alaska)
2
Oman
2
Ontario, Southern
2
Oriente
2
Parque Nacional Yasuní
2
Parque Nacional Yasuní (Ecuador)
2
Petrolia
2
Petrolia (Ont.)
2
Saskatchewan
2
Scotland
2
Stanley (N.D.)
2
Texas Panhandle
2
Trans-Alaska Pipeline (Alaska)
2
Trinidad
2
Trinidad and Tobago
2
Turkey
2
Turkmenistan
2
Uganda
2
Wyoming
2
Afghanistan
1
Africa, Central
1
Alabama
1
Arabian Peninsula
1
Argentina
1
Athabasca River
1
Athabasca River Watershed
1
Athabasca River Watershed (Alta.)
1
Bahia (State)
1
Bahrain
1
Bakken Formation
1
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