A++ Quality Double Psiloceras planorbis | Jurassic Rainbow Ammonite | North Somerset, England

Species: Psiloceras planorbis

Age: Jurassic (180 million years ago)

Formation: Blue Lias Formation

Location: North Somerset, England

Approx. Size of Ammonite: 1.5"x1.5" and 1"x1"

Approx. Size of Matrix: 5.5"x4.75"x.75"

This beautiful double Psiloceras planorbis specimen has brilliant rainbow iridescence throughout their shell. These specimens were discovered in the Blue Lias Formation, near North Somerset, England.

Blue Lias Formation - A geological formation in many parts of England and parts of South Wales. Part of the Lias group. The formation is a sequence of limestone and shale layers which were formed in the latest Triassic and early Jurassic periods. This formation ages back between 195 and 200 million years ago.

Psiloceras - An extinct genus of ammonite. They are one of the earliest known Jurassic ammonites. These ammonites had a smooth shell which set them apart from most other early Jurassic ammonites.