Hi, I split flint pebbles on a beach at Wherrytown, Cornwall, UK to use as chisels to carve granite and dolerite sculptures. This one cleaved nicely and on each facet had near identical patterns. I have seen thousands of flint facets and expect a few fossils, however this looks like a soft bodied creature; Annelida hirudinea. It looks segmented and has iron compounds within as though remains of blood. Have I been fooled by banded flint or is this remarkable preservation of something like a fish leach?
Graham