Unknown Silurian Brachiopods

Here are some unknown Silurian brachiopods found in the Louisville limestone, Jefferson County, Indiana.

Paraspirifer bownockeri Brachiopod with Hederella Bryozoan

Here is a brachiopod fossil that I sandblasted. It is from Sylvania, Ohio, USA in Lucas County. This brachiopod is called Paraspirifer bownockeri (Stewart, 1927) from the Silica Formation. Also note the encrusting Hederella (Hall, 1883) bryozoan (blackish root looking material). Fossil dates to the upper middle Devonian Period (Givetian Stage).

Devonian Wood: Callixylon Fossil

Devonian wood fragments of an Archaeopteris progymnosperm. The wood part is also referred to as a Callixylon. These fragments were found in Bullitt County, Kentucky at road cuts.

This specimen was found in the New Albany shale. The Callixylon log maybe floated into this area from Pennsylvania or New York where it sank and was covered. The weight of layers building up over time flattened the wood pieces. Heat and pressure coalified or vitrinized the wood.