Promicroceras Calcite Ammonite Fossil with Impression Jurassic Coast Black Ven Dorset UK
£ 36.00
SPECIMEN OVERVIEWThis carefully selected fossil specimen features a Promicroceras calcite
ammonite preserved alongside a natural Promicroceras shell impression, recovered from the renowned Black Ven Marls at Charmouth, near Lyme Regis, Dorset. The combination of a three-dimensional calcite-replaced ammonite with its corresponding impression in the surrounding matrix creates a visually striking and scientifically informative piece. This natural pairing clearly illustrates different modes of fossil preservation within the same depositional setting. The photographs show the exact fossil you will receive, with full sizing details available in the images. As with all of our fossils, this specimen is 100% genuine and supplied with a Certificate of Authenticity. GEOLOGICAL FORMATION & PROVENANCEThe fossil originates from Black Ven, one of the most famous and productive fossil localities along the Jurassic Coast, a UNESCO World Heritage Site of global geological importance. The fossil-bearing sediments belong to the Lower Lias Group, deposited during the Early Jurassic Period, approximately 199–196 million years ago. The Black Ven Marls represent fine-grained marine muds laid down in a relatively calm offshore environment. Periodic sediment influx and rapid burial events allowed ammonite shells to be preserved both as mineral-replaced fossils and as detailed impressions within the marl. FOSSIL TYPE & TAXONOMIC CONTEXTPromicroceras is an extinct genus of ammonite within the Class Cephalopoda, Subclass Ammonoidea, and Order Ammonitida. Ammonites were free-swimming marine molluscs related to modern squid and cuttlefish, occupying an important ecological role as predators in Jurassic seas. Promicroceras is characteristic of early Lower Lias ammonite assemblages and is widely used as an index fossil, making specimens of this genus important for understanding Early Jurassic stratigraphy and marine recovery following the end-Triassic extinction. MORPHOLOGY & PRESERVATIONThe calcite-preserved Promicroceras displays the classic tightly coiled shell morphology of the genus, with clearly defined whorls and visible growth features that reflect the animal’s development during life. Calcite replacement has enhanced surface detail while preserving the original shell geometry, giving the fossil a subtle crystalline appearance under light. Adjacent to the shell, the ammonite impression records the original outline and depth of the shell as it was embedded in the sediment. Together, the shell and impression provide a rare and informative snapshot of ammonite preservation within the Jurassic seabed. SCIENTIFIC & COLLECTING SIGNIFICANCEAmmonites from Charmouth and Lyme Regis have been collected and studied for over two centuries and played a central role in the development of early geological and stratigraphic science. Promicroceras is especially significant within Early Jurassic ammonite successions and is highly regarded by both researchers and collectors. Fossils from Black Ven are internationally recognised for their reliable provenance and scientific credibility. Specimens that preserve both a calcite shell and a clear impression are particularly desirable, as they demonstrate multiple fossilisation pathways within a single piece. DISPLAY, CARE & AUTHENTICITYThis fossil is ideal for display in a private collection, educational setting, or natural history cabinet, offering both strong visual appeal and educational value. The specimen has been carefully cleaned to reveal its natural features, with no artificial restoration or reconstruction applied. You will receive the exact fossil shown, accompanied by a Certificate of Authenticity, confirming its geological origin and genuine nature.A scientifically informative and visually engaging fossil from one of Britain’s most iconic fossil cliffs, this Promicroceras ammonite with impression represents an authentic piece of Early Jurassic marine history from the Jurassic Coast.
ammonite preserved alongside a natural Promicroceras shell impression, recovered from the renowned Black Ven Marls at Charmouth, near Lyme Regis, Dorset. The combination of a three-dimensional calcite-replaced ammonite with its corresponding impression in the surrounding matrix creates a visually striking and scientifically informative piece. This natural pairing clearly illustrates different modes of fossil preservation within the same depositional setting. The photographs show the exact fossil you will receive, with full sizing details available in the images. As with all of our fossils, this specimen is 100% genuine and supplied with a Certificate of Authenticity. GEOLOGICAL FORMATION & PROVENANCEThe fossil originates from Black Ven, one of the most famous and productive fossil localities along the Jurassic Coast, a UNESCO World Heritage Site of global geological importance. The fossil-bearing sediments belong to the Lower Lias Group, deposited during the Early Jurassic Period, approximately 199–196 million years ago. The Black Ven Marls represent fine-grained marine muds laid down in a relatively calm offshore environment. Periodic sediment influx and rapid burial events allowed ammonite shells to be preserved both as mineral-replaced fossils and as detailed impressions within the marl. FOSSIL TYPE & TAXONOMIC CONTEXTPromicroceras is an extinct genus of ammonite within the Class Cephalopoda, Subclass Ammonoidea, and Order Ammonitida. Ammonites were free-swimming marine molluscs related to modern squid and cuttlefish, occupying an important ecological role as predators in Jurassic seas. Promicroceras is characteristic of early Lower Lias ammonite assemblages and is widely used as an index fossil, making specimens of this genus important for understanding Early Jurassic stratigraphy and marine recovery following the end-Triassic extinction. MORPHOLOGY & PRESERVATIONThe calcite-preserved Promicroceras displays the classic tightly coiled shell morphology of the genus, with clearly defined whorls and visible growth features that reflect the animal’s development during life. Calcite replacement has enhanced surface detail while preserving the original shell geometry, giving the fossil a subtle crystalline appearance under light. Adjacent to the shell, the ammonite impression records the original outline and depth of the shell as it was embedded in the sediment. Together, the shell and impression provide a rare and informative snapshot of ammonite preservation within the Jurassic seabed. SCIENTIFIC & COLLECTING SIGNIFICANCEAmmonites from Charmouth and Lyme Regis have been collected and studied for over two centuries and played a central role in the development of early geological and stratigraphic science. Promicroceras is especially significant within Early Jurassic ammonite successions and is highly regarded by both researchers and collectors. Fossils from Black Ven are internationally recognised for their reliable provenance and scientific credibility. Specimens that preserve both a calcite shell and a clear impression are particularly desirable, as they demonstrate multiple fossilisation pathways within a single piece. DISPLAY, CARE & AUTHENTICITYThis fossil is ideal for display in a private collection, educational setting, or natural history cabinet, offering both strong visual appeal and educational value. The specimen has been carefully cleaned to reveal its natural features, with no artificial restoration or reconstruction applied. You will receive the exact fossil shown, accompanied by a Certificate of Authenticity, confirming its geological origin and genuine nature.A scientifically informative and visually engaging fossil from one of Britain’s most iconic fossil cliffs, this Promicroceras ammonite with impression represents an authentic piece of Early Jurassic marine history from the Jurassic Coast.
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