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

Pyritised Ammonite (Asteroceras obtusum)

Nature (Lower Jurassic, Sinemurian stage)

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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