Graphoceras cf concavum Ammonite Fossil Jurassic Dorset UK Genuine Specimen COA Inferior Oolite Burton Bradstock Collectable
£ 12.60
GENUINE GRAPHOCERAS CF. CONCAVUM AMMONITE FOSSILThis is a genuine Graphoceras cf. concavum ammonite fossil from the Inferior
Oolite Formation, Middle Jurassic, Aalenian–Bajocian interval, collected from Burton Bradstock, Dorset, UK. This carefully chosen specimen is an attractive and scientifically interesting fossil for collectors of British ammonites, Jurassic fossils, Dorset fossils, marine cephalopods, natural history pieces, and well-labelled geological specimens.The photograph shows the actual fossil you will receive, allowing you to view the individual preservation, colour, surface detail, fossil form, matrix, and natural character of this specimen before purchase. Full sizing details can be seen in the photo. This fossil includes a Certificate of Authenticity lifetime guarantee generic card, confirming it as a genuine specimen. FOSSIL TYPE, GENUS AND SCIENTIFIC IDENTIFICATIONGraphoceras cf. concavum is an ammonite, an extinct marine cephalopod belonging to the order Ammonitida. Ammonites were related to modern squid, cuttlefish, octopus, and nautilus, and are among the most recognisable fossils from the Jurassic Period. Their coiled shells, changing ornamentation, and rapid evolutionary development make them highly valued by collectors and important in palaeontology.The identification Graphoceras cf. concavum means this fossil is comparable to Graphoceras concavum. The abbreviation “cf.” is used in scientific naming when a specimen closely resembles a known species but is identified with a degree of caution, often because of preservation, natural wear, incomplete shell detail, or subtle variation. This makes the fossil especially appealing to collectors who appreciate accurate, careful labelling rather than over-specific identification.Graphoceras is associated with the family Graphoceratidae, a group of Middle Jurassic ammonites known for their compressed, planispiral shells and biostratigraphic importance. Graphoceras concavum is closely linked with the Concavum Zone, a significant ammonite biozone around the Aalenian to Bajocian transition. GEOLOGICAL AGE, FORMATION AND LOCALITYThis fossil comes from the Inferior Oolite Formation of Burton Bradstock, Dorset, UK. The Inferior Oolite is a classic British Jurassic rock unit, well known for fossiliferous limestones, sandy limestones, iron-rich beds, and a rich marine fauna. It records a time when southern Britain was covered by warm, shallow seas that supported abundant ammonites and other marine life.The fossil is dated to the Middle Jurassic, spanning the Aalenian–Bajocian interval, approximately around 174 to 168 million years ago. During this time, ammonites were diverse and widely distributed, making them extremely useful for comparing and dating sedimentary rock layers. The rapid evolution of ammonite species allows geologists to divide Jurassic strata into detailed fossil-based zones and subzones.Burton Bradstock is part of Dorset’s famous Jurassic coastline and inland fossil-bearing geology. Fossils from this region are popular with collectors because they combine classic British provenance, strong geological context, and attractive natural preservation. DEPOSITIONAL ENVIRONMENT AND FOSSILISATIONDuring the Middle Jurassic, the Burton Bradstock area lay beneath shallow marine waters. These ancient seas contained ammonites, belemnites, bivalves, brachiopods, gastropods, echinoids, corals, and other invertebrates. Ammonites such as Graphoceras lived as active swimming cephalopods, moving through the water column before their shells eventually settled onto the sea floor after death.Burial in carbonate-rich sediment allowed some shells to become preserved over millions of years. Mineralisation, compaction, and natural geological alteration gradually transformed the shell remains into fossils. Depending on preservation, a specimen may show original shell detail, an internal mould, matrix attachment, mineral staining, or surface texture produced during fossilisation. AMMONITE MORPHOLOGY AND NATURAL FEATURESGraphoceras cf. concavum displays the classic ammonite planispiral shell form, with the shell coiled in a flat spiral. The whorls represent successive growth stages of the animal, expanding outward as it matured. Graphoceratid ammonites are often noted for their compressed whorl shape, elegant coiling, and subtle ornamentation.This fossil may show whorl curvature, ribbing, compressed profile, natural mineral colour, sedimentary contact marks, weathering, matrix, or fine surface features. These natural characteristics are part of the fossil’s geological history and give the specimen its individual appearance. Small fractures, colour variations, worn areas, and mineral deposits are typical of genuine fossils and help distinguish natural specimens from modern replicas or casts. COLLECTING, DISPLAY AND EDUCATIONAL INTERESTThis Graphoceras cf. concavum ammonite fossil is ideal for display in a fossil cabinet, study, classroom, office, collection drawer, natural history arrangement, or British Jurassic fossil collection. Its named genus, careful “cf.” species identification, Inferior Oolite Formation origin, Aalenian–Bajocian age, and Burton Bradstock locality give it strong collecting appeal.It is suitable for collectors interested in Dorset fossils, British ammonites, Jurassic marine life, extinct cephalopods, palaeontology, geology, and educational fossil specimens. The natural spiral form gives the fossil classic visual impact, while the detailed locality and geological information make it a meaningful specimen from the ancient seas of Jurassic Britain. AUTHENTICITY AND SPECIMEN DETAILSThis is a genuine Graphoceras cf. concavum ammonite fossil from the Inferior Oolite Formation, Middle Jurassic, Aalenian–Bajocian interval, Burton Bradstock, Dorset, UK. It includes a Certificate of Authenticity lifetime guarantee generic card. The photo shows the actual fossil you will receive, and full sizing information can be seen in the photo.
Oolite Formation, Middle Jurassic, Aalenian–Bajocian interval, collected from Burton Bradstock, Dorset, UK. This carefully chosen specimen is an attractive and scientifically interesting fossil for collectors of British ammonites, Jurassic fossils, Dorset fossils, marine cephalopods, natural history pieces, and well-labelled geological specimens.The photograph shows the actual fossil you will receive, allowing you to view the individual preservation, colour, surface detail, fossil form, matrix, and natural character of this specimen before purchase. Full sizing details can be seen in the photo. This fossil includes a Certificate of Authenticity lifetime guarantee generic card, confirming it as a genuine specimen. FOSSIL TYPE, GENUS AND SCIENTIFIC IDENTIFICATIONGraphoceras cf. concavum is an ammonite, an extinct marine cephalopod belonging to the order Ammonitida. Ammonites were related to modern squid, cuttlefish, octopus, and nautilus, and are among the most recognisable fossils from the Jurassic Period. Their coiled shells, changing ornamentation, and rapid evolutionary development make them highly valued by collectors and important in palaeontology.The identification Graphoceras cf. concavum means this fossil is comparable to Graphoceras concavum. The abbreviation “cf.” is used in scientific naming when a specimen closely resembles a known species but is identified with a degree of caution, often because of preservation, natural wear, incomplete shell detail, or subtle variation. This makes the fossil especially appealing to collectors who appreciate accurate, careful labelling rather than over-specific identification.Graphoceras is associated with the family Graphoceratidae, a group of Middle Jurassic ammonites known for their compressed, planispiral shells and biostratigraphic importance. Graphoceras concavum is closely linked with the Concavum Zone, a significant ammonite biozone around the Aalenian to Bajocian transition. GEOLOGICAL AGE, FORMATION AND LOCALITYThis fossil comes from the Inferior Oolite Formation of Burton Bradstock, Dorset, UK. The Inferior Oolite is a classic British Jurassic rock unit, well known for fossiliferous limestones, sandy limestones, iron-rich beds, and a rich marine fauna. It records a time when southern Britain was covered by warm, shallow seas that supported abundant ammonites and other marine life.The fossil is dated to the Middle Jurassic, spanning the Aalenian–Bajocian interval, approximately around 174 to 168 million years ago. During this time, ammonites were diverse and widely distributed, making them extremely useful for comparing and dating sedimentary rock layers. The rapid evolution of ammonite species allows geologists to divide Jurassic strata into detailed fossil-based zones and subzones.Burton Bradstock is part of Dorset’s famous Jurassic coastline and inland fossil-bearing geology. Fossils from this region are popular with collectors because they combine classic British provenance, strong geological context, and attractive natural preservation. DEPOSITIONAL ENVIRONMENT AND FOSSILISATIONDuring the Middle Jurassic, the Burton Bradstock area lay beneath shallow marine waters. These ancient seas contained ammonites, belemnites, bivalves, brachiopods, gastropods, echinoids, corals, and other invertebrates. Ammonites such as Graphoceras lived as active swimming cephalopods, moving through the water column before their shells eventually settled onto the sea floor after death.Burial in carbonate-rich sediment allowed some shells to become preserved over millions of years. Mineralisation, compaction, and natural geological alteration gradually transformed the shell remains into fossils. Depending on preservation, a specimen may show original shell detail, an internal mould, matrix attachment, mineral staining, or surface texture produced during fossilisation. AMMONITE MORPHOLOGY AND NATURAL FEATURESGraphoceras cf. concavum displays the classic ammonite planispiral shell form, with the shell coiled in a flat spiral. The whorls represent successive growth stages of the animal, expanding outward as it matured. Graphoceratid ammonites are often noted for their compressed whorl shape, elegant coiling, and subtle ornamentation.This fossil may show whorl curvature, ribbing, compressed profile, natural mineral colour, sedimentary contact marks, weathering, matrix, or fine surface features. These natural characteristics are part of the fossil’s geological history and give the specimen its individual appearance. Small fractures, colour variations, worn areas, and mineral deposits are typical of genuine fossils and help distinguish natural specimens from modern replicas or casts. COLLECTING, DISPLAY AND EDUCATIONAL INTERESTThis Graphoceras cf. concavum ammonite fossil is ideal for display in a fossil cabinet, study, classroom, office, collection drawer, natural history arrangement, or British Jurassic fossil collection. Its named genus, careful “cf.” species identification, Inferior Oolite Formation origin, Aalenian–Bajocian age, and Burton Bradstock locality give it strong collecting appeal.It is suitable for collectors interested in Dorset fossils, British ammonites, Jurassic marine life, extinct cephalopods, palaeontology, geology, and educational fossil specimens. The natural spiral form gives the fossil classic visual impact, while the detailed locality and geological information make it a meaningful specimen from the ancient seas of Jurassic Britain. AUTHENTICITY AND SPECIMEN DETAILSThis is a genuine Graphoceras cf. concavum ammonite fossil from the Inferior Oolite Formation, Middle Jurassic, Aalenian–Bajocian interval, Burton Bradstock, Dorset, UK. It includes a Certificate of Authenticity lifetime guarantee generic card. The photo shows the actual fossil you will receive, and full sizing information can be seen in the photo.
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