Dorsetensia liostraca Ammonite Fossil Jurassic Dorset UK Genuine COA Card - Bajocian Inferior Oolite Niortense Zone Specimen
£ 36.00
Dorsetensia liostraca Ammonite Fossil from Milborne Wick, DorsetThis is a genuine Dorsetensia liostraca ammonite fossil from the Inferior Oolite
Group, dating to the Middle Jurassic, Bajocian stage, collected from Milborne Wick, Dorset, UK. This specimen is associated with the Niortense Zone, an important Bajocian ammonite biozone, giving it strong geological interest as well as excellent collectable appeal. This carefully chosen fossil is supplied with a Certificate of Authenticity lifetime guarantee generic card, making it a trusted addition to an ammonite collection, natural history cabinet, educational geology display, or fossil gift selection.The photograph shows the actual fossil specimen you will receive. Full sizing and scale can be seen in the photo.Geological Age and FormationThis ammonite comes from the Inferior Oolite Group, one of southern England’s classic Middle Jurassic fossil-bearing rock units. It dates to the Bajocian stage, approximately 170 million years old, when warm shallow to moderately deep seas covered much of what is now Dorset and the wider south-west of England.The Inferior Oolite Group is well known for its limestones, sandy limestones, iron-rich beds, shell fragments, and diverse marine fossil assemblages. These rocks preserve an important record of the Middle Jurassic seas, including ammonites, belemnites, bivalves, brachiopods, gastropods, echinoids, crinoids, fish remains, and other marine organisms. Fossils from this formation are highly sought after because they combine classic British provenance with excellent geological context.Niortense Zone and Jurassic StratigraphyThis specimen is recorded from the Niortense Zone, a recognised Bajocian ammonite biozone. Ammonite zones are used by geologists to date and correlate sedimentary rocks because ammonites evolved rapidly and were widely distributed through ancient seas. A fossil from a named zone is particularly interesting to collectors because it can be placed within a more precise interval of Jurassic time.The Niortense Zone represents part of the Middle Jurassic succession in which distinctive ammonite faunas developed across Europe. This makes the specimen not only an attractive display fossil but also a useful example of how ammonites help palaeontologists and geologists understand the timing and distribution of ancient marine environments.Location: Milborne Wick, DorsetThis fossil was collected from Milborne Wick, Dorset, an area associated with the famous Jurassic geology of southern England. Dorset is internationally recognised for its fossil-rich rocks, and its inland quarries and exposures have produced a wide variety of scientifically important ammonites.During the Bajocian, the Milborne Wick area lay beneath a warm Jurassic sea. Sediments accumulated on the seabed, including carbonate-rich material, shell debris, and iron-bearing minerals. These conditions helped preserve ammonite shells and other marine fossils within the Inferior Oolite Group.Fossil Type and SpeciesThis specimen is identified as Dorsetensia liostraca, an extinct ammonite species from the Middle Jurassic. Ammonites were marine molluscs related to modern squid, cuttlefish, octopus, and nautilus. They possessed coiled external shells divided into internal chambers. The living animal occupied the final outer body chamber, while earlier chambers helped regulate buoyancy as the ammonite moved through the water column.Dorsetensia is a recognised Bajocian ammonite genus and is part of the diverse ammonoid cephalopod faunas found in the Inferior Oolite Group. Ammonites such as this are prized because their shell form, whorl shape, ribbing, and suture patterns are important for identification, dating, and understanding Jurassic marine life.Morphology and Notable FeaturesDorsetensia liostraca ammonites are appreciated for their classic Jurassic spiral form and refined shell structure. Depending on preservation, the specimen may show visible whorls, a defined central umbilicus, natural ribbing or growth lines, mineralised shell texture, and surface detail formed as the animal grew.The coiled shell records the ammonite’s growth through life, with each new whorl representing a later stage of development. Internal chamber walls, known as septa, divided the shell, while suture lines formed where these septa met the outer shell. These features make ammonites scientifically valuable as well as visually appealing.As a genuine fossil, this specimen may show natural matrix, mineral staining, fossil shell texture, colour variation, weathering, small chips, cracks, or areas of natural wear caused by fossilisation and geological history. These features are normal for authentic fossils and add individuality to the piece.Middle Jurassic Marine EnvironmentThis Dorsetensia liostraca ammonite lived in the warm Bajocian seas that covered Dorset during the Middle Jurassic. These marine environments supported a rich ecosystem of swimming cephalopods, fish, and seabed-dwelling invertebrates. Ammonites and belemnites moved through the water column, while bivalves, brachiopods, echinoids, crinoids, gastropods, and other organisms lived on or within the seabed.After death, the ammonite shell could settle onto the sea floor and become buried by sediment. Over millions of years, compaction, mineralisation, and geological change transformed the shell and surrounding sediment into fossil-bearing rock. This fossil is a direct link to the ancient Inferior Oolite seas of Dorset, when dinosaurs lived on land and ammonites flourished in the oceans.Authenticity and CollectabilityThis Dorsetensia liostraca ammonite fossil is a genuine specimen from Milborne Wick, Dorset, UK, dating to the Bajocian, Niortense Zone of the Inferior Oolite Group. It is suitable for collectors of British fossils, Dorset fossils, Jurassic ammonites, Inferior Oolite fossils, marine cephalopods, natural history specimens, educational geology pieces, and display fossils.This carefully selected fossil includes a Certificate of Authenticity lifetime guarantee generic card, and the fossil shown in the photo is the actual specimen you will receive.
Group, dating to the Middle Jurassic, Bajocian stage, collected from Milborne Wick, Dorset, UK. This specimen is associated with the Niortense Zone, an important Bajocian ammonite biozone, giving it strong geological interest as well as excellent collectable appeal. This carefully chosen fossil is supplied with a Certificate of Authenticity lifetime guarantee generic card, making it a trusted addition to an ammonite collection, natural history cabinet, educational geology display, or fossil gift selection.The photograph shows the actual fossil specimen you will receive. Full sizing and scale can be seen in the photo.Geological Age and FormationThis ammonite comes from the Inferior Oolite Group, one of southern England’s classic Middle Jurassic fossil-bearing rock units. It dates to the Bajocian stage, approximately 170 million years old, when warm shallow to moderately deep seas covered much of what is now Dorset and the wider south-west of England.The Inferior Oolite Group is well known for its limestones, sandy limestones, iron-rich beds, shell fragments, and diverse marine fossil assemblages. These rocks preserve an important record of the Middle Jurassic seas, including ammonites, belemnites, bivalves, brachiopods, gastropods, echinoids, crinoids, fish remains, and other marine organisms. Fossils from this formation are highly sought after because they combine classic British provenance with excellent geological context.Niortense Zone and Jurassic StratigraphyThis specimen is recorded from the Niortense Zone, a recognised Bajocian ammonite biozone. Ammonite zones are used by geologists to date and correlate sedimentary rocks because ammonites evolved rapidly and were widely distributed through ancient seas. A fossil from a named zone is particularly interesting to collectors because it can be placed within a more precise interval of Jurassic time.The Niortense Zone represents part of the Middle Jurassic succession in which distinctive ammonite faunas developed across Europe. This makes the specimen not only an attractive display fossil but also a useful example of how ammonites help palaeontologists and geologists understand the timing and distribution of ancient marine environments.Location: Milborne Wick, DorsetThis fossil was collected from Milborne Wick, Dorset, an area associated with the famous Jurassic geology of southern England. Dorset is internationally recognised for its fossil-rich rocks, and its inland quarries and exposures have produced a wide variety of scientifically important ammonites.During the Bajocian, the Milborne Wick area lay beneath a warm Jurassic sea. Sediments accumulated on the seabed, including carbonate-rich material, shell debris, and iron-bearing minerals. These conditions helped preserve ammonite shells and other marine fossils within the Inferior Oolite Group.Fossil Type and SpeciesThis specimen is identified as Dorsetensia liostraca, an extinct ammonite species from the Middle Jurassic. Ammonites were marine molluscs related to modern squid, cuttlefish, octopus, and nautilus. They possessed coiled external shells divided into internal chambers. The living animal occupied the final outer body chamber, while earlier chambers helped regulate buoyancy as the ammonite moved through the water column.Dorsetensia is a recognised Bajocian ammonite genus and is part of the diverse ammonoid cephalopod faunas found in the Inferior Oolite Group. Ammonites such as this are prized because their shell form, whorl shape, ribbing, and suture patterns are important for identification, dating, and understanding Jurassic marine life.Morphology and Notable FeaturesDorsetensia liostraca ammonites are appreciated for their classic Jurassic spiral form and refined shell structure. Depending on preservation, the specimen may show visible whorls, a defined central umbilicus, natural ribbing or growth lines, mineralised shell texture, and surface detail formed as the animal grew.The coiled shell records the ammonite’s growth through life, with each new whorl representing a later stage of development. Internal chamber walls, known as septa, divided the shell, while suture lines formed where these septa met the outer shell. These features make ammonites scientifically valuable as well as visually appealing.As a genuine fossil, this specimen may show natural matrix, mineral staining, fossil shell texture, colour variation, weathering, small chips, cracks, or areas of natural wear caused by fossilisation and geological history. These features are normal for authentic fossils and add individuality to the piece.Middle Jurassic Marine EnvironmentThis Dorsetensia liostraca ammonite lived in the warm Bajocian seas that covered Dorset during the Middle Jurassic. These marine environments supported a rich ecosystem of swimming cephalopods, fish, and seabed-dwelling invertebrates. Ammonites and belemnites moved through the water column, while bivalves, brachiopods, echinoids, crinoids, gastropods, and other organisms lived on or within the seabed.After death, the ammonite shell could settle onto the sea floor and become buried by sediment. Over millions of years, compaction, mineralisation, and geological change transformed the shell and surrounding sediment into fossil-bearing rock. This fossil is a direct link to the ancient Inferior Oolite seas of Dorset, when dinosaurs lived on land and ammonites flourished in the oceans.Authenticity and CollectabilityThis Dorsetensia liostraca ammonite fossil is a genuine specimen from Milborne Wick, Dorset, UK, dating to the Bajocian, Niortense Zone of the Inferior Oolite Group. It is suitable for collectors of British fossils, Dorset fossils, Jurassic ammonites, Inferior Oolite fossils, marine cephalopods, natural history specimens, educational geology pieces, and display fossils.This carefully selected fossil includes a Certificate of Authenticity lifetime guarantee generic card, and the fossil shown in the photo is the actual specimen you will receive.
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