Three Crinoid Fossils (3 Species) - Crawfordsville, Indiana

 
 
These are three really nice crinoids from the bluff's site near Crawfordsville, Indiana. The largest crinoid (Cyathocrinites multibrachiatus) is 4.5" long (including stem), the second largest crinoid (Platycrinites hemisphericus) is 2.15" long (including stem) and the smallest crinoid (Pachylocrinus aequalis) is 1.4" long. This rock also contains ultiple crinoid stem segments. The quality of preparation on this fossil is exquisite - using skillful air-abrasion techniques under a stereo microscope.

Comes with a gibson display stand. There is a repaired crack that runs through the crown of the largest crinoid.

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
$585
DETAILS
SPECIES
Platycrinites hemisphericus, Pachylocrinus aequalis & Cyathocrinites multibrachiatus
LOCATION
Bluff's Site, Crawfordsville, Indiana
FORMATION
Edwardsville Formation
SIZE
Crinoids 4.5, 2.15" & 1.4" long (including stem), Rock 7.4 x 5.8"
CATEGORY
SUB CATEGORY
ITEM
#125924
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