14.3" Crinoid Plate (10 species) - Indiana

 
 
 
 
 
 
 
 
 
 
 
This is a spectacular crinoid association from the Edwardsville Formation near Crawfordsville, Indiana, with seven different species present plus a brachiopod. All are preserved 3D and have been prepared with air abrasives. This is a natural association and none of the specimens are composites.

This specimen is fitted with a wood backing plate for easy wall mounting. A stand can be included on request.

Identification by #:

6 - Barycrinus rhombiferus (two specimens)
16 - Cyathocrinites sp.
17 - Cyathocrinites multibrachiatus
35 - Pachylocrinus aequalis
47 - Scytalocrinus decadactylus (two specimens)
55 - Agaricocrinus splendens (two specimens)
68 - Gilbertsocrinus tuberosus
69 - Macrocrinus mundulus (five specimens)
73 - Platycrinites hemisphericus
81 - Onychocrinus ulrichi


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.

DETAILS
SPECIES
Macrocrinus mundulus & others
LOCATION
Crawfordsville, Indiana
FORMATION
Edwardsville Formation
SIZE
Rock 14.3 x 13.2"
CATEGORY
SUB CATEGORY
ITEM
#95203
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