Tantalising glimpses of ammonite fossils, still deeply embedded in rock – rather than the complete, perfect, and separate specimens that you frequently see featured in books and displays – are the types most likely to be encountered by someone simply walking along and enjoying the beaches of the Jurassic Coast. Many characteristics of these ancient cephalopod mollusc shells are preserved and visible in these embedded fossils but the most evident one is the coiled, compartmented, and ornamented shell which invariably describes a natural spiral pattern.
Revision of a post first published 18 January 2010
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