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14.2" Fossil Crinoid Plate (Four Species) - Crawfordsville, Indiana
This is a beautiful, 14.2" plate of detailed fossil crinoids from Crawfordsville, Indiana. There are four, large, identifiable crinoids representing four separate species. They have been microscopically prepared using air abrasives. The two larger crinoids are Agaricocrinus sp. and a partial Barycrinus rhombiferus. The more slender and less exposed crinoids are Macrocrinus mundulus and Parisocrinus sp.. This plate is quite phenomenal, with a variety of other crinoid bits scattered throughout the rock.
The plate is backed with a foam pad and an acrylic display stand is included for your convenience.
The plate is backed with a foam pad and an acrylic display stand is included for your convenience.
About Crawfordsville Crinoid Fossils
Crinoids from the Ramp Creek Limestone of Crawfordsville, Indiana are world-famous for their extraordinary preservation and diversity. During the Mississippian Period, sudden storm events likely swept fine sediment from nearby deltas across the seafloor, rapidly burying living crinoids where they stood. This quick entombment protected even the most delicate structures, resulting in soft siltstone that can be carefully prepared to reveal fossils in stunning, fully three-dimensional relief.
The Crawfordsville area preserves one of the most important crinoid assemblages ever discovered, with hundreds of described species ranging from common forms to bizarre and highly specialized morphologies. Many specimens retain complete crowns, arms, stems, and even fine pinnules—details that are rarely preserved elsewhere. Because of this exceptional quality, Crawfordsville crinoids have played a major role in the scientific study of crinoid anatomy, evolution, and paleoecology.
Crinoids, often called “sea lilies,” are animals rather than plants and belong to the echinoderms, a group that includes starfish, sea urchins, and brittle stars. Like their relatives, crinoids exhibit radial symmetry, tube feet, a water vascular system, and body parts arranged in multiples of five. Crinoids first appeared in the Ordovician Period, nearly 488 million years ago, and while most of the elaborate stalked forms seen at Crawfordsville are long extinct, a small number of crinoid species still inhabit modern oceans today.
Crinoids from the Ramp Creek Limestone of Crawfordsville, Indiana are world-famous for their extraordinary preservation and diversity. During the Mississippian Period, sudden storm events likely swept fine sediment from nearby deltas across the seafloor, rapidly burying living crinoids where they stood. This quick entombment protected even the most delicate structures, resulting in soft siltstone that can be carefully prepared to reveal fossils in stunning, fully three-dimensional relief.
The Crawfordsville area preserves one of the most important crinoid assemblages ever discovered, with hundreds of described species ranging from common forms to bizarre and highly specialized morphologies. Many specimens retain complete crowns, arms, stems, and even fine pinnules—details that are rarely preserved elsewhere. Because of this exceptional quality, Crawfordsville crinoids have played a major role in the scientific study of crinoid anatomy, evolution, and paleoecology.
Crinoids, often called “sea lilies,” are animals rather than plants and belong to the echinoderms, a group that includes starfish, sea urchins, and brittle stars. Like their relatives, crinoids exhibit radial symmetry, tube feet, a water vascular system, and body parts arranged in multiples of five. Crinoids first appeared in the Ordovician Period, nearly 488 million years ago, and while most of the elaborate stalked forms seen at Crawfordsville are long extinct, a small number of crinoid species still inhabit modern oceans today.
SPECIES
Macrocrinus mundulus, Barycrinus rhombiferus, Parisocrinus sp., Agaricocrinus sp.
LOCATION
Crawfordsville, Indiana
FORMATION
Edwardsville Formation
SIZE
14.2 x 7.1" rock
CATEGORY
SUB CATEGORY
ITEM
#197538
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