FOSSIL AMMONITES #6
dudressieri and Asteroceras margaritoides.
From the Lower Lias (Sinemurian Stage, Jurassic Period) of the Dorset coast, South-West England. This tightly packed assemblage of ammonites was found in a lenticular mudstone concretion on the foreshore below Black Ven at Lyme Regis. It is likely a 'top stone' from just below the Stellare nodule bed.
The large Xipheroceras (upper left) measures just over 2" (5 cm) across. This specimen was found and prepared by Mark.