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...

This picture is of a fossil tree stem preserved in silica. This mineral preserved the air pores or lenticels. It was on display at the ...