• 14 cm Arnioceras semicostatum, Lower Jurassic, Monmouth beach, Lyme Regis

    This 14 cm Arnioceras semicostatum bed was found on Monmouth beach, Lyme Regis. Packed with smaller examples of Arnioceras and one larger one.


    Lower Sinemurian, Black Ven Mudstone Member, Charmouth Mudstone formation. 

    199 MYA


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      Charmouth United Kingdom