Ammonites. Ammonite fossils (Promicroceras martonense) embedded in rock. Also seen is part of a fossilised fish jaw (black). Ammonites are extinct mar
Ammonites. Ammonite fossils (Promicroceras martonense) embedded in rock. Also seen is part of a fossilised fish jaw (black). Ammonites are extinct marine animals which lived between 380 and 65 million years ago. They are distantly related to the modern-day nautilus. They lived in coastal waters and inland seas. The animal lived in the last chamber of its coiled shell. Ammonites are known as zone fossils which means that certain species appear in specific geological formations, allowing accurate dating. This fossil was found in the lower lias rock of Lyme Regis, England. Lower lias is limestone rock which was laid down in the early Jurassic period (195-172 million years ago).
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Photo credit: © SINCLAIR STAMMERS/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
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Keywords: ammonite, ammonoidea, animal, animals, cephalopoda, fish, fossil, fossils, invertebrate, invertebrates, jaw, lias, martonense, palaeontology, paleontology, promicroceras, spiral
