My daughter found this on the beach at West Bay, Dorset, under the cliffs beneath Burton Bradstock.
Despite looking like a hand, I guess it's actually a fossilised shell, but I wondered whether anyone here would be able to put an approximate age on it, and confirm that it is a shell. Is the darker coloured part, the 'filling', just mud?
Thank you for the information. I think it's fairly safe to assume it's from the cliffs, and a bi-valve seems most likely.
re. the reddish 'filling' you can see in the grooves of the fossil, and the other raised cross-markings. Would this be simply mud? From where the shell is split? It is almost crystalline in texture, which you can see in the photo, and a distinct reddish colour.