Fossil Jurassic Ammonite (Asteroceras) Cluster - Dorset, England

This is a beautifully preserved cluster of Asteroceras sp. ammonite fossils from the Lyme Regis region of England. There are about 11 mostly complete ammonites spread out between both sides of the rock, the largest of which measures 1.4" wide. Parts of these ammonites were naturally replaced with calcite which fluoresces green under short-wave UV lighting. A very cool association and an excellent display piece.

An acrylic display stand will accompany your purchase.

Ammonites were predatory cephalopod mollusks that resembled squids with spiral shells. They are more closely related to living octopuses, though their shells resemble that of nautilus species. True ammonites appeared in the fossil record about 240 million years ago during the Triassic Period. 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