Megastrophia (Silver Creek Limestone)

This brachiopod fossil is a nice find in that is over 5 cm in width.  It appears to be intact though needs to be cleaned with sand abrasive cleaning. Usually only the top half is found of this genus, Megastrophia.  These types of brachiopods might be one of the largest found in the Devonian layers around southern Indiana.

Fossil was found in the Silver Creek Member of the North Vernon Limestone of Clark County, Indiana, USA. This layer dates to the Devonian Period (Eifelian).

Hopefully, a posting of it cleaned up can be presented...

Eucalyptocrinites Calyx... Almost Intact

A fossil crinoid calyx about the size of grape. It needs some cleaning but appears to be at least 75% intact. This specimen is an index fossil for the Waldron Shale of the Middle Silurian Period (425-420 million years ago).  Eucalyptocrinites crassus? found in Clark County, Indiana.

Aulopora on Strophodonta Brachiopod

This series of pictures are of two fossil specimens.  The strophodonta brachiopod shell fragments had colonies of Aulopora growing on them. The coral was exposed with the help of Oxalic acid.  The fossils are from the Devonian Period and appear be from the Silica Shale.

Learn more about the Aulopora coral at this Wooster Geologist blog posting from January 2011: CLICK HERE TO READ.

Thanks to Dave at Views of the Mahantango blog for these specimens and the cleaning work performed on them.  You can see some of his Aulopora finds HERE.