• The Historic Entrance of Mammoth Cave

    Mammoth Cave

    National Park Kentucky

Fossils

Nature and Science

Mississippian-age marine fossils are found in Mammoth Cave

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.

Did You Know?

Did You Know? - Mammoth Cave is the world's longest known cave.

Mammoth Cave is the world's longest known cave, with more than 400 miles of interconnected passages—so long that if the second and third longest caves in the world were joined together, Mammoth Cave would still be the planet's longest cave and have more than 100 miles left over!