Golden Pyrite Oxynoticeras simpsoni Ammonite Fossil Jurassic Whitby UK Genuine Specimen Certificate

Description

Genuine Jurassic Fossil – Golden Pyrite Oxynoticeras simpsoni Ammonite

This listing is for a stunning Golden Pyrite Fossil Ammonite, Oxynoticeras simpsoni, collected from the world-renowned fossil beds of Runswick Bay, Whitby, United Kingdom. This rare specimen comes from the Middle Lias (Lower Jurassic) and is approximately 180 million years old. Naturally preserved in iron pyrite, this ammonite gleams with a golden metallic finish, making it as visually striking as it is scientifically significant. Each fossil is carefully chosen, photographed individually, and supplied with a Certificate of Authenticity so you can be assured of its provenance.

Geological Age and Provenance

The specimen originates from the Jurassic Period, specifically the Middle Lias, within the Upper Pliensbachian stage. The fossil-rich rocks of Whitby and Runswick Bay are internationally famous, producing beautifully preserved ammonites, belemnites, and marine reptiles. In certain layers, chemical conditions led to the natural replacement of fossil material with iron pyrite, resulting in the golden ammonites that are now highly prized by collectors worldwide. These unique preservation conditions make Whitby one of the only places on Earth where pyritised ammonites of such quality are found.

Fossil Type and Classification

This specimen represents Oxynoticeras simpsoni, a species within the family Oxynoticeratidae, superfamily Eoderoceratoidea, and order Ammonitida. Ammonites were extinct cephalopods, related to modern squid and octopuses, with coiled external shells divided into chambers used for buoyancy. Oxynoticeras simpsoni is a classic ammonite species of the Whitby region and is considered an important index fossil, helping geologists define and correlate specific zones of the Jurassic stratigraphic sequence.

Morphology and Distinctive Features

The shell of Oxynoticeras simpsoni displays several distinctive traits:

• Compressed, discoidal shape, with flat sides and a sharp venter.
• Fine ribbing running across the whorls, creating delicate ornamentation.
• A narrow umbilicus, exposing only a small portion of inner coils.
• Natural pyritisation, giving the fossil its shimmering golden metallic finish.

These features make this species highly attractive, both scientifically and aesthetically. Its elegant coiling and delicate ribbing, enhanced by the pyrite preservation, ensure that every specimen is a striking display fossil.

Biozone and Scientific Importance

Oxynoticeras simpsoni is widely recognised as a stratigraphically important ammonite, associated with the Oxynotum Biozone of the Lower Jurassic. Its abundance and distinctive morphology make it an excellent index fossil, used to identify and correlate Jurassic marine deposits across Europe. The ability of this species to define specific zones makes specimens like this crucial to paleontological and geological studies.

Depositional Environment

During the Early Jurassic, the area around Whitby was covered by a shallow epicontinental sea. Fine clays and silts settled onto the seabed, burying ammonites soon after death. In certain layers of the Middle Lias, chemical reactions caused the replacement of the original shell with pyrite. This pyritisation preserved intricate details of the ammonite shell, creating fossils with dazzling golden surfaces. These unique conditions are why Whitby remains one of the world’s most celebrated fossil localities.

Historical and Collecting Value

Whitby ammonites have long been celebrated by both scientists and collectors. During the Victorian era, pyritised ammonites were highly sought after for natural history collections and decorative purposes. Today, they are among the most iconic British fossils, admired for their natural beauty, rarity, and scientific importance. A golden pyrite Oxynoticeras simpsoni is not only a collector’s fossil but also a piece of natural artistry created over millions of years.

Authenticity and Presentation

• 100% Genuine Fossil Specimen
• Species: Oxynoticeras simpsoni
• Preservation: Natural pyritisation (golden iron pyrite)
• Age: Jurassic, Middle Lias, approx. 180 million years old
• Location: Runswick Bay, Whitby, United Kingdom
• Supplied with a Certificate of Authenticity
• Scale cube in photographs = 1 cm for accurate sizing
• The fossil shown in the photographs is the exact specimen you will receive

This exceptional Golden Pyrite Oxynoticeras simpsoni ammonite fossil is a rare and desirable piece from Whitby’s Jurassic coast. Combining geological history, scientific significance, and natural beauty, it is a superb addition to any fossil collection.