8" Ammonite (Placenticeras) Fossil - Eastern Montana

Ammonite (Placenticeras) Fossil - Eastern Montana #242363

This is a 8" fossil ammonite (Placenticeras meeki) from the Bearpaw Shale in Eastern, Montana. It has been polished to a glossy finish on one side, with the opposite side left in its natural state. The ammonite underwent some crushing within the ground.

Includes an acrylic-metal display stand.

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