Asteroceras Calcite Ammonite Fossil Jurassic Lyme Regis Dorset Black Ven Marls Stonebarrow Cliff COA Included

Description

Genuine Asteroceras Calcite Ammonite Fossil – Jurassic Coast Classic

Offered here is a beautiful Asteroceras Fossil Calcite Ammonite, a genuine marine fossil preserved within the famous Black Ven Marls of Stonebarrow Cliff, Charmouth, along the world-renowned Jurassic Coast near Lyme Regis, Dorset, UK.

This is an authentic collector-grade ammonite, naturally mineralised with pale calcite preservation that highlights the shell’s elegant structure and Jurassic-age detail. The specimen has been carefully chosen for its quality, display appeal, and classic Charmouth provenance.

The fossil shown in the photographs is the exact specimen you will receive. Full sizing details are provided in the images, ensuring complete confidence when purchasing.

This fossil is a genuine specimen and includes a Certificate of Authenticity with lifetime guarantee, supplied as a generic authenticity card for added assurance.

Geological Setting – Black Ven Marls, Lower Lias, Early Jurassic

This fossil originates from the renowned Black Ven Marls, part of the Lower Lias Group, dating back approximately 190–200 million years to the Early Jurassic Period.

During this time, Dorset was submerged beneath a warm, shallow sea rich in ammonites, belemnites, fish, and marine reptiles. Fine muds and marls accumulated on the sea floor, rapidly burying shells and allowing exceptional fossil preservation.

Stonebarrow Cliff and the surrounding Charmouth coastline are among Britain’s most famous fossil localities, producing some of the finest ammonites in the world. The unique chemistry of these sediments often resulted in calcite replacement, preserving ammonites with pale, crystalline detail.

Fossil Species – Asteroceras Ammonite

Asteroceras is a distinctive genus of Early Jurassic ammonite belonging to:

• Class: Cephalopoda
• Subclass: Ammonoidea
• Order: Ammonitida
• Superfamily: Arietitoidea
• Family: Asteroceratidae

Asteroceras is especially well known from the Lower Lias of Dorset and is highly valued by collectors for its bold whorl shape, strong ribbing, and classic Jurassic appearance.

These ammonites were active marine predators, closely related to modern squid and cuttlefish, and thrived in Jurassic seas. Their rapid evolution and widespread distribution make them important index fossils for dating Lower Jurassic rocks.

Calcite Preservation – Natural Mineral Beauty

This specimen is preserved as a calcite ammonite, meaning the original shell material has been replaced or infilled with calcium carbonate during fossilisation.

Calcite preservation can produce:

• Pale, crystalline internal detail
• Strong contrast against the surrounding matrix
• Enhanced surface texture and ribbing
• Attractive natural colour tones

Each calcite ammonite is unique, combining palaeontology with mineral charm, making these fossils particularly appealing for display and collection.

Authenticity and Collector Confidence

Every fossil we offer is carefully selected, responsibly sourced, and supplied with authenticity assurance.

• Genuine Jurassic ammonite fossil
• Exact specimen shown in listing photos
• Includes Certificate of Authenticity lifetime guarantee card
• Carefully chosen collector-quality piece

Ideal For Collectors, Gifts, and Display

This Asteroceras fossil is perfect for:

• Ammonite fossil collectors
• Jurassic Coast enthusiasts
• Educational geology study
• Museum-style display cabinets
• Unique prehistoric gifts

A wonderful opportunity to own a genuine Asteroceras Calcite Ammonite Fossil from the legendary Jurassic Coast of Dorset, preserved from an ancient sea nearly 200 million years ago and supplied with a lifetime Certificate of Authenticity.