Submitted by: David Thompson
Taxon: Spongophyllum alpenense.
Submit date: 2008-05-11
Location (approximate): Alpena, Alpena, MI
Stratigraphy: Potter Farm Formation
Age: Erian (Middle Devonian)
Submitter notes: A complete coral head for the Spongophyllum alpenense species,similar to the famous 'Petoskey'stone,(Hexagonaria sp.) when these are water worn or polished. This is the natural fossil with unworn coralites as it was buried in sediment and preserved in detail.