1.8" Fossil Crinoid (Macrocrinus) - Crawfordsville, Indiana

This is a small but infladed Macrocrinus mundulus crinoid from the famous crinoid beds near Crawfordsville, Indiana. The crinoid has been prepped free from the rock it was found in and later remounted into this rock. There is a large white mass that has been prepped free from the rock as well, likely a large carbonate mass.

Comes with an acrylic 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.

Macrocrinus mundulus
Crawfordsville, Indiana
Edwardsville Formation
1.8" long (including stem) on 3.1 x 2.9" rock
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