Shark Tooth

Here is a shark tooth that came from a rock shop in either Montana or North Dakota.

Ordovician Gastropod

Here is an Ordovician gastropod in Jefferson County, Kentucky.

Thamnoptychia alternans Coral

Here is a Devonian coral found in Jeffersonville, Indiana that can be found in the Beechwood Limestone. Here is Thamnoptychia alternans fragment. I really like the swirl pattern on this stem piece.