An amonite from the Jurassic Era. This one was found in the Charmouth area, well known for its fossils. Amonites were a type of cephalopod related to modern day squids and octopus. This fossil dates back around 150 million ago Posted by Dorset Guide on Thu, 04/02/2009 - 10:30 × Related images Trilobite and Ammonite - Weymouth Fossil Forest - Jurassic Coast Ammonite Pavement - Lyme Regis