Cretaceous Ammonite

Cretaceous ammonite Placenticeras syrtale Morton found in Barbour County. Ammonites first appeared in the seas 400 million years ago and died out during the Cretaceous-Paleogene mass extinction about 66 million years ago. This specimen dates to the Campanian age, approximately 72 to 83 million years ago.

Courtesy of the University of Alabama Museums/Alabama Museum of Natural History