This fossil appears to be the bottom of a Lyriocrinus calyx cup found in the Waldron Shale of Clark County, Indiana. It is dated to the M...

Here is a picture of an ostracode microfossil found in the Waldron Shale of Clark County, Indiana, USA. It is about 420 million years old ...

This picture is of a microfossil called a scolecondont (part of a worm jaw). It was found in the Waldron Shale of Clark County, Indiana, U...