11.5" Crinoid Fossil Cluster - Crawfordsville, Indiana

 
 
 
 
 
This is a 11.5" cluster of four fossil crinoids (1-Scytalocrinus decadactylus, 2-Cyanthocrinites iowensis) from Crawfordsville, Indiana. Fragments of unidentified crinoids are also present.

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.

FOR SALE
$245
DETAILS
SPECIES
Platycrinites pencillus, Macrcrinus mundulus
LOCATION
Crawfordsville, Indiana
SIZE
11.5 x 6"
CATEGORY
SUB CATEGORY
ITEM
#102824
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