Last week I visited Alpena, Michigan USA with several amateur
paleontologists from Louisville and one from Chicago. We were luck to
have a local paleontologist Paleo Joe (aka
Joseph Kchodl) as our guide. This picture is of one of his finds from Alpena. A common coral known as
Favosites mammillatus (Stumm & Tyler, 1964). It was found in the Potter Farm Formation and lived in the middle Devonian Period.