Enrolled Phacops rana

First two images of an enrolled Phacops rana (Green, 1832) trilobite fossil found in the Silver Creek Member of the North Vernon Limestone of Clark County, Indiana.  This fossil has been sandblasted though concrete like residue still remains in between thorax segments.  Creature existed in the Middle Devonian Period.  Nice size for this trilobite at about 3 cm wide.

Still not been able to determine if pygidium or cephalon exists on this fossil due to hardness of matrix.  Tried using the engraver some to expose more of fossil but conservative use due to fragile nature of fossil.

Fossil in plate before sand blasting.

Elaeacrinus verneuili Blastoid

Middle Devonian Period blastoid fossil called Elaeacrinus verneuili (Römer [aka Roemer], 1851). The pictures were taken in my cousin's workshop where he has been trying to extract this fossil from a large matrix piece.  So my lighting was fluorescent overhead so the images are a little blurry.

Fossil is about the size of a grape.

The blastoid is in Jeffersonville Limestone.

Aulopora on Protoleptostrophia/Devonchonete Brachiopods

This image shows an Aulopora (Goldfuss, 1829) coral growing across the surface of a Protoleptostrophia perplana (Conrad, 1839) brachiopod.  It is surrounding quite a few Devonochonetes (Muir-Wood, 1962) brachiopods. The plate was found in the Silver Creek Member of the North Vernon Limestone.  Specimens found in Clark County, Indiana.  Fossil creatures shown existed in the Middle Devonian Period (Eifelian).  Need to figure out a way to clean the matrix out of the little horn shapes.

Next picture shows the plate before it was sandblasted.  You can see quite a few Aulopora (Goldfuss, 1829) corals and some of the brachiopod surface.

Here is another piece of Aulopora (Goldfuss, 1829) my cousin will be sandblasting in the near future.  The Silver Creek matrix is some of the best to abrasively clean.  I believe this layer is the one used to create cement with.