This Specimen has been sold.
7.3" Tall Concretion with Ammonite (Eleganticeras) Fossils - England
Here is a 7.3" tall concretion that's filled with Eleganticeras elegantulum ammonite fossils from Whitby, England. These well preserved ammonites are Jurassic in age and are found in hard concretions that must be split open to reveal the fossils. Additional rock has been removed to expose the fossils and one edge has been cut flat for presentation purposes.
Ammonites were predatory mollusks that resembled a squid with a shell. These cephalopods had eyes, tentacles, and spiral shells. They are more closely related to a living octopus, though the shells resemble that of a nautilus. True ammonites appeared in the fossil record about 240 million years ago. The last lineages disappeared 65 million years ago at the end of the Cretaceous.