This picture is of a Hildoceras bifrons (Bruguiere) ammonite fossil. It was found in Newcastle England. Creature existed in the Jurassic...

This image shows a Dawsonoceras annulatum (J. Sowerby) cephalopod fossil. It was found in the Silurian Period Wenlock series of  Coalb...

This picture is of coniferous tree twig that has turned to coal.  It was found in Austria. The fossil dates to the Oligocene Epoch of th...