This fossil appears to be a Thamnoptychia vermiculosa branching coral fossil. It was found in the Beechwood Limestone of Clark County, In...

This image is of two coral fossils. One is growing upon another, they appear to be Aulocystis frutecticosa on Thamnoptychia vermiculosa ...

Here is a nice fossil of an Archimedes bryozoan. It was found in Grayson County Kentucky USA. The fossil dates to the Mississippian Perio...