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

Description

Genuine Promicroceras Calcite Ammonite Fossil – Jurassic Coast Collectors Specimen

Offered here is a beautiful and authentic Promicroceras Fossil Calcite Ammonite, collected from the world-famous Black Ven Marls at Stonebarrow Cliff, Charmouth, near Lyme Regis on the UNESCO-listed Jurassic Coast, Dorset, UK.

This is a genuine marine fossil from the Early Jurassic seas, preserved with striking natural calcite mineralisation that enhances the ammonite’s detail and gives it outstanding display appeal. The fossil shown in the photographs is the exact specimen you will receive, carefully selected for its quality and character.

This fossil is a genuine specimen and includes a Certificate of Authenticity lifetime guarantee generic card, making it ideal for collectors, gift buyers, and educational use.

Full sizing details are provided in the photographs for complete confidence before purchase.

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

Promicroceras ammonites from Charmouth originate from the 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 lay beneath a warm shallow sea rich in marine life. Fine muds accumulated on the seabed, rapidly burying shells and allowing exceptional fossil preservation. These sediments later hardened into fossil-bearing marls and limestones that now form the dramatic cliffs of Lyme Regis and Charmouth.

Stonebarrow Cliff is one of the most productive ammonite localities in Britain, internationally renowned for yielding beautifully preserved specimens, often with calcite infill and mineral detail.

Fossil Type – Promicroceras Ammonite

Promicroceras is a classic small ammonite genus from the earliest Jurassic, valued for its elegant form and crisp ribbing. It belongs to:

• Class: Cephalopoda
• Subclass: Ammonoidea
• Order: Ammonitida
• Superfamily: Eoderoceratoidea
• Family: Eoderoceratidae

Promicroceras is particularly associated with Lower Lias ammonite faunas and is an important index fossil used in dating Early Jurassic strata.

These ammonites were active nektonic predators, related to modern squid, occupying open marine environments where they hunted small prey in the ancient seas of Europe.

Morphology and Natural Detail

This specimen displays the classic Promicroceras features that collectors seek:

• Distinct coiled shell with symmetrical whorls
• Fine ribbing across the flanks
• Strong natural preservation in marl matrix
• Attractive calcite mineral enhancement

Calcite preservation provides a unique combination of fossil and mineral beauty, creating a natural contrast between the ammonite and surrounding rock.

Calcite Fossilisation – A Unique Jurassic Preservation

This is a calcite ammonite fossil, meaning the internal shell spaces have been naturally infilled or replaced by crystalline calcium carbonate during fossilisation.

Calcite preservation is highly prized because it can:

• Highlight surface texture and ribbing
• Add bright mineral definition
• Create a striking display appearance
• Preserve delicate details rarely seen in ordinary fossils

Each calcite ammonite is completely unique, formed over millions of years through natural geological processes.

Authenticity, Display, and Collector Value

Every fossil is carefully chosen and responsibly sourced from classic British fossil beds.

• Genuine Promicroceras ammonite fossil
• Exact specimen shown in photographs
• From Stonebarrow Cliff, Charmouth, Dorset
• Includes Certificate of Authenticity lifetime guarantee card
• Ideal for collectors, gifts, or educational displays

Perfect For Fossil Collectors and Jurassic Enthusiasts

This Promicroceras calcite ammonite makes an excellent addition to any collection and is perfect for:

• Ammonite fossil collectors
• Jurassic Coast enthusiasts
• Geological study and teaching
• Display cabinets or desk collections
• A meaningful prehistoric gift

A superb opportunity to own a genuine Promicroceras Calcite Ammonite Fossil from the legendary Lower Jurassic deposits of Lyme Regis, preserved from an ancient sea nearly 200 million years ago.