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.

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October's Featured Park
Arches National Park is known for its' remarkable natural red sandstone arches. With over 2,000 catalogued arches that range in size from a three-foot opening, to Landscape Arch which measures 306 feet from base to base, the park offers the largest concentration of natural arches in the world.
October's Animal
Most commonly found in the tundra of Rocky Mountain National Park, the pika is a close relative of the rabbits and hares, with two upper incisors on each side of the jaw, one behind the other. Being rock-gray in color, pikas are seldom seen until their shrill, metallic call reveals their presence.