Submitted by: David Thompson
Taxon: Dolatocrinus triangulatus
Submit date: 2009-06-03
Location (approximate): Alpena, Alpena, MI
Stratigraphy: Thunder Bay Formation
Age: Erian (Middle Devonian)
Submitter notes: Small crinoid calyx from the Thunder bay limestone at Partridge Point in Alpena
The Caylx is about 3/4' or 20 mm in diameter and about 9/16' or 15mm high. This shows the ornamented base and stem attachment