Fossils for Sale - High-quality BRITISH and WORLDWIDE Fossils. An impressive selection of fossils, including Ammonites, Trilobites, Belemnites, Fossil Fish, Fossil Shark Teeth, Fossilised Insects in Amber, Dinosaurs, and Reptiles. UK Fossils was formed in 1988 and collects and preps our own fossils in the heart of the Jurassic Coast, collecting fossils from Lyme Regis, Charmouth and Somerset. Our passion for fossils is reflected in our carefully curated collection, which includes some of the rarest and most unique specimens available.

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Bed of Promicroceras and Cymbites Multi Block Calcite Ammonite Fossils Black Ven Marls Lower Lias Jurassic Coast Lyme Regis Dorset UK
Bed of Promicroceras and Cymbites Multi Block Calcite Ammonite Fossils Black Ven Marls Lower Lias Jurassic Coast Lyme Regis Dorset UK - Image 2
Bed of Promicroceras and Cymbites Multi Block Calcite Ammonite Fossils Black Ven Marls Lower Lias Jurassic Coast Lyme Regis Dorset UK - Image 3
Bed of Promicroceras and Cymbites Multi Block Calcite Ammonite Fossils Black Ven Marls Lower Lias Jurassic Coast Lyme Regis Dorset UK - Image 4
Bed of Promicroceras and Cymbites Multi Block Calcite Ammonite Fossils Black Ven Marls Lower Lias Jurassic Coast Lyme Regis Dorset UK - Image 5
Bed of Promicroceras and Cymbites Multi Block Calcite Ammonite Fossils Black Ven Marls Lower Lias Jurassic Coast Lyme Regis Dorset UK - Image 6
Bed of Promicroceras and Cymbites Multi Block Calcite Ammonite Fossils Black Ven Marls Lower Lias Jurassic Coast Lyme Regis Dorset UK - Image 7
Bed of Promicroceras and Cymbites Multi Block Calcite Ammonite Fossils Black Ven Marls Lower Lias Jurassic Coast Lyme Regis Dorset UK - Image 8

Bed of Promicroceras and Cymbites Multi Block Calcite Ammonite Fossils Black Ven Marls Lower Lias Jurassic Coast Lyme Regis Dorset UK

£240.00

Genuine Multi Block of Promicroceras and Cymbites Ammonite Fossils

This listing is for an authentic multi block of Promicroceras and Cymbites ammonite fossils from the Black Ven Marls, Lower Lias, on the world-famous Jurassic Coast at Black Ven, Lyme Regis, Dorset, UK. This exceptional specimen features multiple ammonites preserved in calcite, creating a striking display piece that captures the richness of Early Jurassic marine life. The fossil pictured is the exact piece you will receive, with a 1 cm scale cube included for accurate size reference.

The specimen was discovered on 14 September 2025 by our experienced field collectors, Alister and Alison, and has been professionally cleaned, prepped, and treated by Alison. As with all our fossils, it is supplied with a Certificate of Authenticity, confirming it as a 100% genuine specimen.

Geological Context and Age

This fossil originates from the Black Ven Marls, part of the Lower Lias sequence exposed at Lyme Regis on the Dorset coast. These deposits belong to the Lower Jurassic, approximately 200 million years ago, and are internationally renowned for their fossil abundance and scientific importance.

The Black Ven Marls represent sediments laid down in a shallow marine environment, where fine clays and silts accumulated and preserved the remains of marine organisms. Ammonites from this horizon are key index fossils, used in biostratigraphy to define Early Jurassic biozones. Fossiliferous blocks such as this one provide a rare opportunity to see ammonites preserved together in their natural depositional context.

Species Information – Promicroceras and Cymbites

Promicroceras is a small but highly distinctive ammonite genus belonging to the order Ammonitida, superfamily Eoderoceratoidea, and family Eoderoceratidae. It is characterised by its tightly coiled, evolute shell with fine ribbing and occasional tubercles, giving it a spiny appearance in well-preserved specimens. These ammonites were among the earliest representatives of the Eoderoceratidae and are classic fossils of the Lower Jurassic.

Cymbites is another genus of small ammonites from the Lower Jurassic, typically featuring smooth, compressed shells with less pronounced ribbing compared to Promicroceras. Belonging to the same superfamily, Cymbites exhibits a more streamlined shell morphology, reflecting differences in lifestyle and ecological adaptation. Together, these two genera provide an important snapshot of ammonite diversity during the earliest Jurassic.

Fossil Features and Preservation

This block displays multiple ammonites preserved in calcite, a feature that enhances their visual appeal. The calcite infill highlights the coiled shells beautifully, contrasting with the surrounding matrix. Several individuals of both Promicroceras and Cymbites are present, showcasing variation in shell form and ornamentation.

The multi block format offers insight into the depositional environment, where numerous ammonites were buried together in the fine sediments of the Black Ven Marls. Preparation has revealed the fossils clearly, while leaving them embedded within the natural stone matrix, making the specimen both scientifically valuable and highly decorative.

Collector and Scientific Significance

This specimen is not only visually impressive but also scientifically significant. Fossils of Promicroceras and Cymbites are key indicators in Early Jurassic stratigraphy and are central to studies of ammonite evolution. Multi blocks of this type provide a richer picture of ammonite assemblages, helping to reconstruct palaeoenvironments and species interactions.

For collectors, this specimen offers a rare chance to own a bed of calcite-preserved ammonites from the UNESCO World Heritage-listed Jurassic Coast. Its provenance, careful preparation, and display quality make it an excellent addition to private collections, museums, or educational displays.

A Unique Jurassic Fossil from Lyme Regis

This Promicroceras and Cymbites ammonite fossil multi block is a rare and genuine piece of Britain’s Jurassic heritage. With multiple ammonites preserved together in calcite, it captures both the beauty and the scientific importance of the Black Ven deposits. Supplied with a Certificate of Authenticity, it is a unique addition to any fossil collection.

All of our Fossils are 100% Genuine Specimens & come with a Certificate of Authenticity.

 

(Actual as seen)

Only 1 left in stock

SKU: CF3392 Category:

Description

Genuine Multi Block of Promicroceras and Cymbites Ammonite Fossils

This listing is for an authentic multi block of Promicroceras and Cymbites ammonite fossils from the Black Ven Marls, Lower Lias, on the world-famous Jurassic Coast at Black Ven, Lyme Regis, Dorset, UK. This exceptional specimen features multiple ammonites preserved in calcite, creating a striking display piece that captures the richness of Early Jurassic marine life. The fossil pictured is the exact piece you will receive, with a 1 cm scale cube included for accurate size reference.

The specimen was discovered on 14 September 2025 by our experienced field collectors, Alister and Alison, and has been professionally cleaned, prepped, and treated by Alison. As with all our fossils, it is supplied with a Certificate of Authenticity, confirming it as a 100% genuine specimen.

Geological Context and Age

This fossil originates from the Black Ven Marls, part of the Lower Lias sequence exposed at Lyme Regis on the Dorset coast. These deposits belong to the Lower Jurassic, approximately 200 million years ago, and are internationally renowned for their fossil abundance and scientific importance.

The Black Ven Marls represent sediments laid down in a shallow marine environment, where fine clays and silts accumulated and preserved the remains of marine organisms. Ammonites from this horizon are key index fossils, used in biostratigraphy to define Early Jurassic biozones. Fossiliferous blocks such as this one provide a rare opportunity to see ammonites preserved together in their natural depositional context.

Species Information – Promicroceras and Cymbites

Promicroceras is a small but highly distinctive ammonite genus belonging to the order Ammonitida, superfamily Eoderoceratoidea, and family Eoderoceratidae. It is characterised by its tightly coiled, evolute shell with fine ribbing and occasional tubercles, giving it a spiny appearance in well-preserved specimens. These ammonites were among the earliest representatives of the Eoderoceratidae and are classic fossils of the Lower Jurassic.

Cymbites is another genus of small ammonites from the Lower Jurassic, typically featuring smooth, compressed shells with less pronounced ribbing compared to Promicroceras. Belonging to the same superfamily, Cymbites exhibits a more streamlined shell morphology, reflecting differences in lifestyle and ecological adaptation. Together, these two genera provide an important snapshot of ammonite diversity during the earliest Jurassic.

Fossil Features and Preservation

This block displays multiple ammonites preserved in calcite, a feature that enhances their visual appeal. The calcite infill highlights the coiled shells beautifully, contrasting with the surrounding matrix. Several individuals of both Promicroceras and Cymbites are present, showcasing variation in shell form and ornamentation.

The multi block format offers insight into the depositional environment, where numerous ammonites were buried together in the fine sediments of the Black Ven Marls. Preparation has revealed the fossils clearly, while leaving them embedded within the natural stone matrix, making the specimen both scientifically valuable and highly decorative.

Collector and Scientific Significance

This specimen is not only visually impressive but also scientifically significant. Fossils of Promicroceras and Cymbites are key indicators in Early Jurassic stratigraphy and are central to studies of ammonite evolution. Multi blocks of this type provide a richer picture of ammonite assemblages, helping to reconstruct palaeoenvironments and species interactions.

For collectors, this specimen offers a rare chance to own a bed of calcite-preserved ammonites from the UNESCO World Heritage-listed Jurassic Coast. Its provenance, careful preparation, and display quality make it an excellent addition to private collections, museums, or educational displays.

A Unique Jurassic Fossil from Lyme Regis

This Promicroceras and Cymbites ammonite fossil multi block is a rare and genuine piece of Britain’s Jurassic heritage. With multiple ammonites preserved together in calcite, it captures both the beauty and the scientific importance of the Black Ven deposits. Supplied with a Certificate of Authenticity, it is a unique addition to any fossil collection.

All of our Fossils are 100% Genuine Specimens & come with a Certificate of Authenticity.

 

Additional information

Era

Jurassic
Origin

United Kingdom

Jurassic Information

The Jurassic Period (201–145 million years ago) was the golden age of dinosaurs, with iconic species like Brachiosaurus, Stegosaurus, and Allosaurus dominating the land. It was a time of warm, humid climates, with high sea levels that created vast shallow seas, supporting abundant marine reptiles, ammonites, and early coral reefs. The first birds, such as Archaeopteryx, evolved from small theropod dinosaurs, while early mammals remained small and nocturnal. Lush forests of cycads, conifers, and ferns covered the land, providing food for giant herbivores. The breakup of the supercontinent Pangaea accelerated, shaping Earth's geography and setting the stage for the diverse ecosystems of the Cretaceous.

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