Ammonites. Cluster of small and large ammonites on a piece of rock. These are extinct marine animals which lived between 380 and 65 million years ago.
Ammonites. Cluster of small and large ammonites on a piece of rock. These are extinct marine animals which lived between 380 and 65 million years ago. Distantly related to the modern-day nautilus, ammonites were cephalopod molluscs, resembling a squid-like animal within a coiled shell. They lived in coastal waters and inland seas. Ammonites are zone fossils which means certain species appear in specific geological formations, allowing accurate dating. These ammonites are from British lower lias rock. This is limestone rock which was laid down in the early Jurassic Period (195-172 million years ago). These ammonites are from the Martin Rigby collection.
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Photo credit: © SINCLAIR STAMMERS/SCIENCE PHOTO LIBRARY / Alamy / Afripics
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Keywords: ammonite, ammonites, ammonoidea, animal, animals, cephalopoda, cluster, fossil, fossils, invertebrate, invertebrates, large, lias, palaeontology, paleontology, rock, small, spiral
