Aulacophyllum horn coral found in the Jeffersonville Limestone of Clark County, Indiana. The coral existed in the Devonian Period.

Pictures of fern fossils from St. Clair, Pennsylvania. These plants grew in the Late Carboniferous or Pennsylvanian Period and can be found...

This nice fossil find is from the Jeffersonville Limestone of Louisville, Kentucky.  It is a Hexagonaria coral that existed in the Middle D...