Description
Very Rare Genuine Pliosaur Fossil Block from the Upper Jurassic of Oxfordshire
This exceptionally rare genuine Pliosaur fossil block contains an impressive association of vertebra, rib material, and partial paddle remains preserved within natural matrix from the Kimmeridge Clay Formation of Abingdon, Oxfordshire, UK. Dating to the Upper Jurassic Kimmeridgian stage, approximately 157 to 152 million years ago, this remarkable marine reptile fossil represents an extraordinary piece of prehistoric ocean history.
The exact fossil shown in the photographs is the specimen you will receive. This carefully chosen display piece includes a fully hand-signed Premium Certificate of Authenticity confirming the specimen is completely genuine.
Please refer to the photographs for full sizing and scale of the fossil block.
About Pliosaurs
Pliosaurs were massive apex marine reptiles belonging to the order Plesiosauria and suborder Pliosauroidea. These formidable predators inhabited Jurassic and Early Cretaceous seas and are recognised for their enormous skulls, powerful jaws, streamlined bodies, and large paddle-like limbs adapted for propulsion through ancient oceans.
Unlike long-necked plesiosaurs, pliosaurs possessed shorter necks and heavily built bodies designed for active predation. Some species are believed to have reached lengths exceeding 10 metres and occupied the top tier of marine food chains, feeding on fish, cephalopods, and other marine reptiles.
The fossil remains preserved within this block provide evidence of the skeletal structure of these highly specialised marine predators. Vertebrae, ribs, and paddle elements are particularly desirable among collectors due to their direct association with the locomotion and anatomy of these iconic Jurassic reptiles.
Geological Formation and Jurassic Marine Environment
This fossil originates from the famous Kimmeridge Clay Formation, one of Britain’s most important Upper Jurassic marine deposits. The Kimmeridge Clay was deposited during the Kimmeridgian stage within shallow epicontinental seas that covered much of southern England.
The formation is composed primarily of organic-rich marine mudstones and clays deposited in relatively low-energy offshore environments. These ancient seas supported an abundance of marine life including ammonites, marine crocodiles, ichthyosaurs, plesiosaurs, pliosaurs, fish, crustaceans, and numerous invertebrates.
Exceptional preservation within the Kimmeridge Clay occurred because fine-grained sediments rapidly buried carcasses on oxygen-poor seabeds, slowing decomposition and scavenging activity. Over millions of years, mineralisation processes replaced and preserved the original skeletal material within the sedimentary matrix.
The Abingdon region of Oxfordshire has produced important Jurassic vertebrate material and remains highly regarded among collectors and palaeontologists for Upper Jurassic marine reptile fossils.
Fossil Features and Preservation
This fossil block preserves multiple associated skeletal elements including a substantial vertebra measuring approximately 8 inches alongside rib fragments and partial paddle material embedded within natural Jurassic matrix. Associated skeletal material significantly enhances the rarity and visual impact of the specimen compared to isolated bones.
The vertebra displays the characteristic spool-shaped morphology commonly associated with plesiosaurian marine reptiles, while preserved rib and paddle elements provide additional anatomical context and display appeal. Natural bone texture, mineralisation patterns, and matrix contrast contribute to the scientific and aesthetic value of the fossil.
The surrounding matrix may exhibit natural sedimentary textures, pyritic inclusions, mineral veining, or marine depositional features formed during fossilisation. Colouration can vary through shades of grey, dark brown, black, cream, or mineralised ochre tones depending on preservation conditions within the Kimmeridge Clay sediments.
As a genuine marine reptile fossil formed over millions of years, each specimen is entirely unique in preservation, arrangement, and geological character.
Rare Museum Style Display Fossil
Associated marine reptile fossil blocks from the Kimmeridge Clay Formation are highly sought after due to their rarity, scientific importance, and dramatic display quality. Large vertebral specimens accompanied by additional skeletal elements are especially desirable among collectors of British vertebrate fossils.
This specimen is ideal for:
- Advanced fossil collections
- Marine reptile collections
- Jurassic fossil collections
- Museum-style geological displays
- Natural history collections
- Educational and palaeontological study displays
- Curiosity cabinets and interior décor
- Gifts for serious fossil collectors and enthusiasts
The combination of vertebra, rib material, and paddle remains creates an impressive multi-element display piece representing one of the Jurassic ocean’s most iconic predators.
Genuine Upper Jurassic Marine Reptile Fossil
This VERY RARE Pliosaur fossil block from the Kimmeridge Clay Formation, Abingdon, Oxfordshire, UK is a genuine carefully selected specimen chosen for its rarity, preservation quality, and exceptional display appeal.
The exact fossil shown in the photographs is the specimen you will receive. Every fossil supplied by us is 100% genuine and includes a fully hand-signed Premium Certificate of Authenticity, providing confidence in the authenticity and provenance of this extraordinary Upper Jurassic marine reptile fossil.
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