Pyritised Ammonite (Asteroceras obtusum)

Nature (Lower Jurassic, Sinemurian stage)

Asteroceras obtusum specimen, showing pyritised shell — Image via Wikipedia: Asteroceras

Rarity: Common

Date

c. 195 million years BP

Object Type

Fossil

Medium / Material

Pyritised ammonite in limestone matrix

Production Place

Black Ven, Lyme Regis, Dorset, England

Dimensions

H 85 × W 85 × D 20 mm · 145 g

Condition

Good

A well-preserved coiled ammonite cephalopod from the Lower Jurassic cliffs of the Dorset coast, partially replaced by golden iron pyrite.

Materials & Techniques

Iron pyrite, calcite, limestone

Location

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