Large Devonian blastoid from Alpena, MI

Submitted by: Ken Dobson
Taxon: Placoblastus obovatus
Submit date: 2008-10-07
Location (approximate): Alpena, Alpena, MI
Stratigraphy: Thunder Bay Formation
Age: Erian (Middle Devonian)
Submitter notes: This large Placoblastus blastoid is in matrix and slightly crushed.

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