Lichenalia concentrica bryozoan fossil found in the Waldron Shale (Silurian Period) of Clark County, Indiana USA. Listed on Plate 5 Figur...

Unidentified crinoid fossils found in southern Indiana. Mississippian Period was the time of their existence. These remains are a monument...

A relatively large fossil cystoid is pictured here. It is probably a Caryocrinites persculptis which is found in the Waldron Shale of Cla...