Sunday, September 9, 2012
A while back my friend Herb gave me a piece of matrix from Red Hill roadcut in Clinton County, Pennsylvania, USA. After leaving the sample outside for weeks it began to break apart. In one of the pieces, I found this impression. It looks to me to be some sort of brachiopod with radial lines (costae or plicae) and a light blue layer with maybe muscle scars on it. If it is a brachiopod it is very compressed.
Looking for more information about Red Hill locality (Duncannon Member, Catskill Formation), I consulted the Devonian Times web site. It lists the site as a Late Devonian area (Famennian Stage, 361 million years old). The area was an area that flooded due to a near by river. If this was a river, I am not sure about this fossil since I thought brachiopods were marine creatures.