4.6" Fossil Crinoid Plate (Two Species) - Crawfordsville, Indiana

This is a beautiful, 4.6" wide plate of detailed fossil crinoids from Crawfordsville, Indiana. These fossils have been microscopically prepared using air abrasives, revealing their intricate details and three dimensional preservation. The two crinoids include Macrocrinus mundulus (#69 - 2.85" long including stem) and Scytalocrinus decadactylus (#47 - 4.1" long including stem).

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.



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DETAILS
SPECIES
Macrocrinus mundulus & Scytalocrinus decadactylus
LOCATION
Crawfordsville, Indiana
FORMATION
Edwardsville Formation
SIZE
4.6 x 3.5" rock
CATEGORY
SUB CATEGORY
ITEM
#231931
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