4.2" Crinoid (Platycrinites) Fossil - Crawfordsville, Indiana

 
 
 

This is a really nice, 4.2" long Platycrinites crinoid from the famous crinoid beds near Crawfordsville, Indiana. There is a gastropod (Platyceras) attached to the crown of the crinoid. The quality of preparation on this fossil is exquisite - using skillful air-abrasion techniques under a stereo microscope.

Part of the stem is a composite from another crinoid fossil that has been mounted onto the rock.

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.

FOR SALE
$225
DETAILS
SPECIES
Platycrinites hemisphericus & Platyceras
LOCATION
Crawfordsville, Indiana
FORMATION
Edwardsville Formation
SIZE
Platycrinites 4.2" long, Rock 6.3x5.6"
CATEGORY
SUB CATEGORY
ITEM
#92760
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