Subject Region
United States
4
Australia
3
Alaska
2
China
2
La Rioja
2
La Rioja (Spain)
2
Mexico
2
Morrison Formation
2
Southwestern States
2
Spain
2
Africa
1
Alberta
1
Asia
1
Badlands (S.D. and Neb.)
1
Bahariya Oasis
1
California
1
Chicago
1
Dinosaur Provincial Park
1
Dinosaur Provincial Park (Alta.)
1
Earth (Planet)
1
Egypt
1
Europe
1
Gobi Desert (Mongolia and China)
1
Gondwana (Continent)
1
Illinois
1
Liaoning Sheng
1
New York
1
New York (State)
1
Niger
1
North America
1
Pennsylvania
1
Pittsburgh
1
Polar Regions
1
South America
1
Utah
1
West (U.S.)
1
Wyoming
1