A small piece of Marston Marble containing two very well-preserved ammonites, Xipheroceras Xiphus with a pronounced spine and Promicroceras Marstonense. A rare British fossil from a location which is no longer accessible.
Location: Marston Magna, Somerset, England
Age: Lower Jurassic, Lower Lias, Obtusum Zone - 200 million years old
Measurements: 4.5cm (length) x 3cm (width)
Weight: 19.96g
