× Mammoth Cave National Park Info Accessibility Activities Air Quality Amphibians Animals Birds Camping Cave Karst Systems Climate Contacts Crustaceans Environmental Factors Facilities Facts Fees Fire Regime Fish For Kids Forests Fossils Geology Grasses Ground Water Insects Lodging In The Park Lodging Mammals Mammoth Cave National Park Maps Mollusks Natural Features Nature And Science Nearby Attractions Nonnative Species Other Invertebrates Plan Your Visit Planning Plants Reptiles Rivers And Streams Springs And Seeps Water Quality Popular Topics Road Trips Wildlife Geology Featured National Parks Arches National Park Bryce Canyon National Park Canyonlands National Park Death Valley National Park Everglades National Park Glacier National Park Grand Canyon National Park Grand Teton National Park Great Smoky Mountains National Park Rocky Mountain National Park Yellowstone National Park Yosemite National Park Zion National Park All National Parks Outdoor Gear Hike & Camp Men's Apparel Women's Apparel Footwear Bike Climb Ski Snowboard Paddle Snowshoe Accessories Shop All Gear Site Info About Us and Mission Privacy Policy Disclaimer Find us on Google+ Contact Us

Mammoth Cave National Park Fossils

The Mississippian limestones of the Mammoth Cave region (300-325 million years old) formed at the bottom of a shallow saltwater sea now known as the Mississippian Sea. The marine life of that ancient sea is reflected in a range of fossils interspersed through the various limestone strata and exposed on the cave walls as caves were hollowed out. Typical fossils found in the cave include crinoids, blastoids, gastropods, and the teeth of fossil sharks.