Ashfall Fossil Beds State Historical ParkAntelope County, northeast Nebraska
Tertiary
65 to 1.8 Million Years Ago
Miguasha National ParkSouth-eastern Quebec on the southern coast of the Gaspé peninsula
Devonian
417 to 354 Million Years Ago
Falls of the Ohio State ParkClark County, Indiana, and Jefferson County, Kentucky
Devonian
417 to 354 Million Years Ago
Green River FormationSweetwater County, Wyoming
Tertiary
65 to 1.8 Million Years Ago
Rancho La Brea Tar PitsLos Angeles County, California
Quaternary
1.8 Million Years Ago to Present
Florissant Fossil Beds National MonumentTeller County, Colorado
Tertiary
65 to 1.8 Million Years Ago
Burgess ShaleYoho National Park, British Columbia, Canada
Cambrian
543 to 490 Million Years Ago
John Day Fossil Beds National MonumentGrant County, Oregon
Tertiary
65 to 1.8 Million Years Ago
Mazon CreekWill County, Illinois
Carboniferous
354 to 290 Million Years Ago
Petrified Forest National ParkNavajo County, Arizona
Triassic
248 to 206 Million Years Ago
Calvert CliffsCalvert Cliffs State Park, Calvert County, Maryland
Tertiary
65 to 1.8 Million Years Ago
Devonian ShalesLucas County, Ohio
Devonian
417 to 354 Million Years Ago
Blackberry HillNear Mosinee, Marathon County, Wisconsin
Cambrian
543 to 490 Million Years Ago
Badlands National ParkJackson, Pennington, and Shannon Counties, southwest South Dakota
Tertiary
65 to 1.8 Million Years Ago
Joggins Fossil CliffsJoggins, Cumberland County, Nova Scotia
Carboniferous
354 to 290 Million Years Ago
Cleveland-Lloyd Dinosaur QuarryEmery County, Utah
Jurassic
206 to 144 Million Years Ago
The Mammoth SiteHot Springs, Fall River County, South Dakota
Quaternary
1.8 Million Years Ago to Present
Dinosaur Provincial ParkRed Deer River valley, southeast Alberta, Canada
Cretaceous
144 to 65 million years ago