The discs were stacked together to form a long stalk that attaches the animal to the sea floor. Sea lily crinoid's lengthy history began during the Ordovician Period around 500 million years ago, although most fossils are from the Mississipian Period around 345 mya and are preserved in limestone. AGE Early Permian (280 million years) LOCATION Gascoyne Junction, Western Australia FORMATION Cundlego Formation By this time, most crinoids had evolved to use rooted or cirri attachments rather than the cemented holdfasts … That is they have been … These unusual, beautiful and graceful animals are living fossils. exposed fossil beds of the devonian period, falls of the ohio state park, clarksville, indiana, usa - crinoid fossils stock pictures, royalty-free photos & images The Mississippian is often referred to as the “Age of Crinoids” because of the biodiversity and shear abundance of crinoids—it was during this time that the Late Paleozoic crinoid evolutionary fauna arose. Amazing Jimbacrinus Crinoid Fossils. Crinoids The Downside of The One Hole System. Exposed in this potential catastrophe were shale beds which yielded these small crinoid stem like fossils. crinoid stem like fossils "Crinoid stem fragments". The geologic unit from which they were obtained is called the Ramp Creek member of the Edwardsville formation. They live in both shallow water and in depths as great as 9,000 meters (30,000 ft). Cambrian age rocks were scoured when a huge rush of water spilled from a failed pumped-back-electrical storage facility, (Taum Sauk Reservoir) in southern Missouri. They filter food from the surrounding water by the use of feeding arms. Crinoid & Blastoid Fossils The earliest known crinoid groups date back to the Ordovician. Sea lilies are in fact animals, despite the appearance of being plants. They are from the stems of an animal that looks a little like a flower, but is really a relative of the starfish. Crinoids be glad you’re not a crinoid these animals poop through their mouth yuck. Crinoid fossils look like small discs with holes in their centers, like Cheerios. You've come to the right place to learn the facts about these living fossils you’ll tell your friends about. These Lower Mississippian age crinoids of Indiana were mined from a crinoid lens discovered within a ravine leading into Indian Creek during the early 1980s.