Budding Horn Corals - Entelophyllum?

This could be an Entelophyllum coral. This specimen was found in the Louisville Limestone. It existed during the Middle Silurian Period and was found in Jefferson County, Kentucky.

I am amazed at all the budding horn corals that were preserved in this piece.

Hemiaster whitei (Sea Urchin Fossil)

Some before and after pictures of a Hemiaster whitei fossilized sea urchin. It is from Turrant County, Texas (Goodland Formation). The creature existed in the Cretaceous Period.

It had some matrix all over it but the air abrasive unit removed the matrix in short order. This specimen is about the size of a prune. Same specimen in all four pictures. The top two show the fossil's topside and the bottom two show what it looked


This next one is a work in progress. An engraving tool has been used to remove the matrix off some of the fossil. Now an air abrasive is used to clean to the surface detail. This specimen is about the size of a chicken egg.

Beginning Air Abrasive Cleaning Cryptolithus Trilobite

Yesterday, I posted some images of Cryptolithus trilobites found in the Kope Formation, Carroll County, Kentucky. The visible part of the fossil (see last photo) could be seen on both sides of the cephalon. I decided that the middle could be air abrasive cleaned along with an engraver. As you can see (first two pictures) the whole bottom rim is now visible along with some of the inside shell. Whether the head plate is intact remains to be seen. Also part of the genial spine emerged.

Another part of the rock, yesterday I speculated part of a starfish arm might be visible. I am now wondering if this is just an imprint made in the matrix by the holes along the cephalon plate of the Cryptolithus.