Silurian coral Arachnophyllum pentagonum ( Goldfuss ) found in Louisville limestone showing a top and side views. Here are two pieces of...

I found this mineral deposit in a coral piece. It looks like pyrite but there is some green in this. Some sort of hexagon type coral. ...

I found the rear section of a Devonian trilobite the other day. It was different than ones I have found before in that the center line or a...