This is a very impressive 8" long Actinocrinites gibsoni from the famous Crawfordsville, Indiana crinoid beds. The quality of preparation on this fossil is exquisite - using skillful air-abrasion techniques under a stereo microscope. The crown of the crinoid is 3.4" long, very detailed and 3D. The stem of the crinoid is quite long, but the crinoid is a composite meaning the stem and crown are not from the same crinoid. There is a gastropod that's partially exposed from the arms of the crown. This gastropod is of the species Platyceras equilateralis.
The solid limestone slab measures 9.2x4.1" and comes with a display stand.
It is believed that crinoids from the Ramp Creek Limestone were buried in sediment from nearby deltas during storms. The resulting siltstone deposits are soft enough that fossils can be extracted in exquisite, three-dimensional relief.
Crinoids, sometimes commonly referred to as sea lilies, are animals, not plants. They are echinoderms related to starfish, sea urchins, and brittle stars. Many crinoid traits are like other members of their phylum. Such traits include tube feet, radial symmetry, a water vascular system, and appendages in multiples of five (pentameral). They first appeared in the Ordovician (488 million years ago) and some species are still alive today.
Washington state has now joined over a dozen other states to put in place “shelter in place” or “stay at home” orders. While we agree this is the correct course of action, it will have a substantial impact on our business. It effectively shuts down much of our company for several weeks.
We will continue taking orders on our website and we will have a single staff member at our warehouse to facilitate shipping of these new orders. Depending on the order volume this may mean that we do experience some shipping delays, particularly with large or fragile items that require more packaging time.
These shutdowns are particularly devastating to all small businesses who don’t have significant cash reserves and rely on constant cash flow to pay their fixed expenses (payroll, rent, loan payments, etc) We hope that you will continue to support us and satisfy your fossil fix during these trying times.