These pictures of a Hexagonaria anna (Whitfield, 1973) coral fossil. It was found in the Bell Shale of the Traverse Group of Alpena, Mich...

These pictures of what looks like a Heliophyllum sp. (Hall, 1846) coral fossil plus there are some bryozoan colonies. It was found in the ...

These pictures are of an Atrypa sp. (Hall, 1862) brachiopod fossil. It was found in the Genshaw Formation at Carmeuse Quarry of Rogers City...