These pictures show a Petalodus (Hall, 1858) shark tooth fossil. They were found in the Salem Limestone of Hardin County, Kentucky USA....

  This picture shows some Globoendothyra baileyi (Hall, 1858) foraminifera fossils. They were found in the Salem Limestone of Hardin County...

This picture is of a Capetus palustris (Steen, 1938) tetrapod jaw fossil. It existed during the Carboniferous period. The fossil was found i...