Cheirurus Trilobite Cephalon

I believe this trilobite cephalon fragment is from a Cheirurus sp. It was found in the Waldron Shale of Clark County, Indiana and is from the Silurian Period. In March 2010, I documented another fragment that is less complete. See that posting here. This new fossil seems to have one of the compound eyes. Unlike the other which was a cast, this one has fossilized shell.
The fossil shown is over 2 cm in size and has not been cleaned yet. The other eye may still be embedded in the matrix.

Heliophyllum Horn Coral with Aulopora

This fossil has been prepared with abrasive cleaning to reveal a nice Aulopora coral colony growing on a larger Heliophyllum horn coral. The fossil is from the Devonian Period and was found in Clark County, Indiana, USA. Thanks to Kenny for loaning it to me.

Eucalyptocrinus elrodi Crinoid Calyx

The fossil shown here is an Eucalyptocrinus elrodi (Miller, 1891) crinoid calyx found in the Waldron Shale of Davidson County, Tennessee, USA. It was found in the 1960s. Fossil dates to the Silurian Period.

The plate texture on this crinoid calyx is very nice.