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2.2" Agaricocrinus Crinoid - Indiana
This is a 2.2" long Agaricocrinus splendens crinoid from the Edwardsville Formation near Montgomery Co., Indiana. The quality of preparation on this fossil is exquisite - using skillful air-abrasion techniques under a stereo microscope.
The stem on this specimen is a composite from another specimen.
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.
The stem on this specimen is a composite from another specimen.
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 splendens
LOCATION
Montgomery Co., Indiana
FORMATION
Edwardsville Formation
SIZE
2.2" long including stem. 3.3x2.3" rock
CATEGORY
SUB CATEGORY
ITEM
#68578
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