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2.8" Agaricocrinus Crinoid Fossil - Crawfordsville, Indiana
This is a rare, 2.8" long Agaricocrinus nodulosus crinoid fossil from the famous crinoid beds near Crawfordsville, Indiana. It's preserved very 3D and well prepared using air abrasives under microscope.
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
Agaricocrinus nodulosus
LOCATION
Witherspoon Quarry, Crawfordsville, Indiana
FORMATION
Ramp Creek Limestone
SIZE
2.8" long
CATEGORY
SUB CATEGORY
ITEM
#68474
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