Asteroceras marstonense & Promicroceras planicosta.
Palm sized piece of the famous 'Ammonite Marble' from Marston Magna. The top surface shows a beautiful 3D Asteroceras in amongst a host of Promicroceras. At least 15 complete Promicroceras showing. Marston specimens with fine Asteroceras are now very difficult to obtain.
Jurassic, Upper Sinemurian, Obtusum Zone, 'Ammonite Marble'.
Marston Magna, Somerset.
Specimen : 7 x 7.5 x 2.5 cm.
