Region
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Arkansas
5
Fossil Butte National Monument (Wyo.)
5
Hagerman Fossil Beds National Monument
5
John Day Fossil Beds National Monument
5
John Day Fossil Beds National Monument (Or.)
5
Mississippi
5
National Petroleum Reserve (Alaska)
5
Nevada
5
North Slope
5
North Slope (Alaska)
5
Ohio
5
Tanzania
5
Tonga
5
United States, West
5
Agate Fossil Beds National Monument
4
Baja California (Peninsula)
4
Brazil
4
Chengjiang (Yunnan Sheng)
4
Cradle of Humankind World Heritage Site (South Africa)
4
East (U.S.)
4
East Anglia
4
Enewetak Atoll
4
Ethiopia
4
Gulf States
4
Japan
4
Maine
4
Maryland
4
Mississippi Embayment
4
New Jersey
4
Russia (Federation)
4
Southwestern States
4
Washington (State)
4
America
3
Arctic regions
3
Asia
3
Bighorn Basin (Mont. and Wyo.)
3
Bikini Atoll
3
Cloverly Formation
3
Edmonton (Alta.)
3
Greece
3
Kenya
3
Mexico, Gulf of
3
National Petroleum Reserve
3
New England
3
Okinawa-ken
3
Olduvai Gorge
3
Olduvai Gorge (Tanzania)
3
Pacific Ocean
3
Patagonia (Argentina and Chile)
3
San Juan Basin (N.M. and Colo.)
3
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