Mctapmonkey Posted August 6, 2017 Share Posted August 6, 2017 This one must be fossil material. Picked up at Ravenscar, North Yorkshire Coast, Jurassic, Marine deposits. I don't know what it is. Link to comment Share on other sites More sharing options...
TqB Posted August 6, 2017 Share Posted August 6, 2017 Large, flattish pieces of shell like that from around there usually belong to the ammonite Phylloceras. That sort of septarian nodule is typical of the Upper Lias which fits. Tarquin Link to comment Share on other sites More sharing options...
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