Huge Promicroceras pyritosum ammonite fossil (29 mm) pyrite 75 inches) across

75 inches) across

The bivalve has taken the shape of the ammonite's whorls as it grew on it

This shows a real snapshot of life in the Early Jurassic

75 inches) across and contains an ammonite that measures 78 mm (3

Huge Promicroceras pyritosum ammonite fossil (29 mm) pyrite 75 inches) acrossA highly pyritised ammonite fossil of the species Promicroceras pyritosum from the world famous Jurassic Coast beach of Charmouth, Dorset UK. The fossil measures 29 mm (1. 15 inches) across, which is giant for this species and about as big as they get. The ammonite is very well preserved on both sides, which is rare for a specimen of this size. The ribs are very finely defined and the pyritic colour and shine is beautiful. A great example of the