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ASTEROCERAS / PROMICROCERAS - JURASSIC, MARSTON MAGNA, SOMERSET.
Asteroceras sp. with Promicroceras planicosta (J. Sowerby).
A base cut piece of the famous 'Ammonite Marble' from Marston Magna. Shows a big damaged Asteroceras lying in amongst a number of smaller Promicroceras. Many of the Ammonites have their original shell preserved. There is still some debate as to the naming of these Marston Magna Asteroceras but the rock is in the Obtusum zone of the upper Sinemurian.
Jurassic, Upper Sinemurian, Obtusum Zone. 'Ammonite Marble'.
Marston Magna near Yeovil, Somerset.
Matrix : 11.5 x 10 x 3 cm.
Our Price: £30.00
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