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 ...

This picture is of a palm stem silica fossil. It was found in Sardinia. The fossil dates to the Tertiary Period. It was on display at ...

This picture is a trace fossil made by possible crustaceans. It was found in Arabia. It was on display at the British Natural History ...