1.35" Jurassic Fossil Ammonite Cluster (Caloceras) - United Kingdom

Jurassic Fossil Ammonite Cluster (Caloceras) - United Kingdom #219986

This is a 1.35" wide association in rock of multiple ammonites (Caloceras cf. belcheri) collected from North Yorkshire in the United Kingdom. The specimen is free standing at 2.3" tall, and contains 2 well preserved ammonites and one partial ammonite.

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.

What an ammonite would have looked like while alive.

More about ammonites