Crinoid Calyx

Submitted by: David Clark
Taxon: Dolatocrinus sp.
Submit date: 2009-04-12
Location (approximate): Alpena, Alpena, MI
Stratigraphy: Alpena Formation
Age: Erian (Middle Devonian)
Submitter notes: A side view of the broken specimen showing an internal crystal structure of mineral replacement.

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