7.7" Polished, Agatized Ammonite Fossil - Madagascar

Polished, Agatized Ammonite Fossil - Madagascar #77006

This is a beautiful, 7.7" wide, polished ammonite fossil from the Mahajanga Province of Madagascar. It's Early Cretaceous (Albian Stage) in age, or approximately 110 million years old and of the genus Cleoniceras.

The shell has been polished away on the upper part of the specimen to reveal the beautiful suture pattern that lies underneath.

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