United States 118 Wyoming 113 Colorado 106 Montana 88 Texas 80 Utah 63 Alaska 52 California 44 West (U.S.) 43 Powder River Basin (Wyo. and Mont.) 42 New Mexico 38 Kansas 29 Alberta 28 British Columbia 25 San Juan Basin (N.M. and Colo.) 21 North America 20 Israel 19 Puerto Rico 19 South Dakota 19 Greenland 18 New Jersey 18 Alabama 17 Canada 17 South Carolina 17 Uinta Basin (Utah and Colo.) 17 France 15 Georgia 15 Mesaverde Group 15 North Dakota 15 Piceance Creek Basin 15 Mexico 13 Mississippi 13 Northwest Territories 13 Uinta Basin 13 Arizona 12 Dakota Formation 12 Gulf Coast (U.S.) 12 Southern States 12 Wind River Basin 11 Black Hills (S.D. and Wyo.) 10 Carbon County 10 Frontier Formation 10 Bighorn Basin (Mont. and Wyo.) 9 Canada, Western 9 England 9 Germany 9 Great Plains 9 Pierre Shale 9 Australia 8 Europe 8 Gulf States 8 Oregon 8 United States, West 8 Caribbean Area 7 Front Range (Colo. and Wyo.) 7 Grand County 7 Idaho 7 New York (State) 7 Switzerland 7 Tennessee 7 Wind River Basin (Wyo.) 7 Yukon 7 Antarctica 6 Arkansas 6 Brazil 6 Garfield County 6 Green River Watershed (Wyo.-Utah) 6 Japan 6 Kaiparowits Plateau 6 Lakota Formation 6 Mancos Shale 6 Maryland 6 Middle East 6 New Zealand 6 North Carolina 6 Pacific Coast (U.S.) 6 Atlantic Coast (U.S.) 5 Beaverhead County 5 Black Hills 5 Book Cliffs (Utah and Colo.) 5 Cuba 5 Emery County 5 Fremont County 5 Italy 5 Judith River Formation 5 Lance Formation (Colo. and Wyo.) 5 Mississippi Embayment 5 Nebraska 5 Nunavut 5 Ocean Point 5 Oklahoma 5 Portugal 5 Vancouver Island 5 Virginia 5 America 4 Arctic regions 4 Asia 4 Colorado Plateau 4 Denmark 4 Dinosaur Provincial Park 4