Jurassic Colour

Plagiostoma Species

This small fossil shell was collected from the Ancaster Rag at Great Ponton near Grantham, UK. The shell was fossilised in Jurassic sediments and due to the nature of the fossilization, the colour banding on the shell has been preserved. It shows pigmentation which is remarkably like those seen on modern-day shells, suggesting that the mechanism which provides the colour on the surface of these molluscs is a very ancient mechanism.