Message was edited by: Innyangler
Message was edited by: Luanne
I think this is a flint nodule rather than a fossil I'm afraid. It's often difficult to identify rocks in photographs but the second photo appears to show the darker surface and conchoidal (curved) fracture of freshly broken flint. As flint is exposed, the surface weathers from dark and smooth to yellow/white and rough. Flint nodule are often shapes like these are are often brought in for ID as possible claws or teeth. sometimes the shape is chance and sometimes it is because the flint formed from a silica gel that lined a burrow created by a small crystacean in the sea bed, preserving the curved shape of that burrow. Thes are called burrow infills. This one is a particularly good likeness for a claw! I've attached an information sheet with more info on how flint forms.
I agree with Luanne, its flint, im afraid.
Thanks Luanne, the inside of the rock does appear to be a dark substance, but it has a matt finish and the facture feels dull at the edges, not sharp as I would expect from flint.
The pictures do not do the rock justice, the base appears to thicken with four posts.There appears to be a definate outer layer surrounding the hard inner, this is about 2mm in thickness and has broken away in places (almost like bark). The outer shell is dark brown with grooves, my first impression was that this may be fossilised wood, the point worn by flowing water and the base is the remains of the knot. But it does have a remarkable claw like similarity.
I do see a lot of flint nodules and occasionally flint tools but this has a different look and feel. It does not seem as dense as flint.
Is there anything else I can look out for ?