The Tertiary

Hagerman Fossil Beds National Monument: Layers of sediments have preserved an exquisite world class assemblage of Pliocene fossils in this national park.

John Day Fossil Beds National Monument: The official National Park Service site has information on when and how to get to the monument, what to see and do, camping and lodging, as well as maps and books for sale.

Florissant Fossil Beds National Monument: This official site of the National Park Service has information on the rocks and fossils at the monument, as well as information on how and when to get there, fossil images, and educational resources.

Calvert Cliffs State Park: This site has information on the fossils and rocks of the park, including maps, trail guides, activities, and events.

Ashfall Fossil Beds State Historical Park: This park preserves a fossil site formed when volcanic ash fell about 12 million years ago, covering the savannah-like grasslands of northeastern Nebraska. The park offers interpretive displays, a fossil preparation lab and educational programs.

Badlands National Park: Located in South Dakota, Badlands National Park is a trove of Miocene vertebrate fossils.

Agate Fossil Beds: Agate Fossil Beds National Monument preserves the rich fossil deposits of Miocene fossils.

Fossil Butte National Park: Designated a national park in 1972, Fossil Butte has preserved some of the most fossil-rich exposures of the Green River Formation for all to see. At this website, you can find information on the fossils and rocks in the park, as well as how to get there.

Ginkgo Petrified Forest State Park: This park protects the remains of Miocene trees that were caught in a basalt field. Many different species of trees were preserved. It includes an Interpretive Center.

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