Promicroceras marstonense, Xipheroceras xiphus
Lower Jurassic, Lower Lias, Obtusum zone
Marston magna, Somerset, UK
This is a stunningspecimen that has been fully prepared on one side. There are dozens of equisite Promicroceras and Xipheroceras.running through this piece. The preservation of the Ammonites is in yellow calcite. The bottom and rear of this specimen has been cut so that it is free standing.
The matrix measures approximately 9cm's x 6.5cm's