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Rare Eretmocrinus & Barycrinus Association - Crawfordsville, Indiana
This is an exceptional association of a rare Eretmocrinus sp. and a Barycrinus stellatus crinoid from the famous crinoid deposits in Crawfordsville, Indiana. The larger of the crinoids (Eretmocrinus) is 2.5" in length and they are both very detailed and 3d. The piece was prepared using air abrasives under microscope to reveal the outstanding preservation of these fossils.
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.
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.
SPECIES
Eretmocrinus sp. & Barycrinus stellatus
LOCATION
Witherspoon Quarry, Crawfordsville, Indiana
FORMATION
Ramp Creek Limestone
SIZE
Eretmocrinus 2.5", Barycrinus 1.8"
CATEGORY
SUB CATEGORY
ITEM
#48397
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