Ashfall Fossil Beds: Fossil "Pompeii" of Prehistory. Ash from a Yellowstone hotspot eruption million years ago created these fossilized bone beds. The Ashfall Fossil Beds are especially famous for fossils of mammals from the middle Miocene geologic epoch.
Coon Creek Fossils -- Pterotrigonia thoracica -- The official state fossil of Tennessee -- It existed during the Cretaceous Period (about 70 MYA). This fossil was found in McNairy County, Tennessee (Coon Creek Formation).
A rare Jimbacrinus crinoid fossil from Australia. Jimbacrinus had 5 arms that were lined with fine tentacle-like structures. Like all crinoids, it used these unfurled arms to feed on small animals and.