Very Rare Dinosaur Bone Fossil Jurassic Abingdon Oxfordshire UK – Kimmeridge Clay Formation Specimen with Hand Signed Certificate

Description

Very Rare Dinosaur Bone Fossil from the Kimmeridge Clay of Oxfordshire

This genuine dinosaur bone fossil originates from the Kimmeridge Clay Formation near Abingdon, Oxfordshire, United Kingdom, and dates to the Upper Jurassic Period during the Kimmeridgian Stage approximately 157–152 million years ago. Fossil dinosaur remains from this formation are exceptionally uncommon, making specimens such as this particularly desirable for collectors of British vertebrate fossils.

The Kimmeridge Clay Formation is a well-known Upper Jurassic geological unit across southern England, famous for preserving a rich marine fossil assemblage. However, terrestrial vertebrate remains such as dinosaur bone fragments are rarely encountered within these sediments, as most dinosaur fossils are more commonly found in continental deposits rather than marine mudstones.

The fossil shown in the photographs is the exact specimen you will receive, carefully selected for its authenticity and preservation. The specimen includes a fully hand-signed Premium Certificate of Authenticity, confirming the fossil is genuine.

Please refer to the photographs for full specimen sizing and scale.

Dinosaur Remains from the Late Jurassic of Britain

During the Late Jurassic, dinosaurs were the dominant land animals across much of the world, including the region that would later become the United Kingdom. Although the Kimmeridge Clay was primarily deposited in marine environments, occasional remains of terrestrial animals—including dinosaurs—were transported into the sea by rivers or coastal processes.

These remains were then buried within marine sediments and preserved alongside marine fossils. Because of this unusual depositional pathway, dinosaur bones from marine formations are relatively rare and often fragmentary.

Dinosaurs from the Late Jurassic of Britain include several groups such as:

• Sauropods, the long-necked herbivorous dinosaurs
• Theropods, the carnivorous predators
• Stegosaurs, armoured herbivores with distinctive plates

Although this specimen is indeterminate at species level, the bone represents a genuine fragment of dinosaur skeletal material from the Late Jurassic ecosystem of southern England.

Geological Context – The Kimmeridge Clay Formation

The Kimmeridge Clay Formation is one of the most important Upper Jurassic sedimentary units in the United Kingdom. These rocks were deposited during the Kimmeridgian Stage, when much of southern Britain lay beneath a warm shallow sea.

The formation consists primarily of organic-rich marine mudstones and shales, which accumulated slowly on the seabed in low-energy marine conditions. These sediments are well known for their exceptional fossil content and have been studied extensively by geologists.

Typical fossils found within the Kimmeridge Clay include:

• Marine reptiles such as plesiosaurs and pliosaurs
• Ichthyosaurs
• Ammonites and belemnites
• Bivalves and other marine invertebrates
• Fossil fish

Occasionally, remains of terrestrial animals—including dinosaurs—were transported into the marine basin, where they became buried within the accumulating sediments.

Characteristics of Fossilised Dinosaur Bone

Fossilised dinosaur bone typically retains the internal microstructure of the original skeletal material, even though the organic components have been replaced by minerals during fossilisation.

Common characteristics of fossil dinosaur bone include:

• A dense outer cortical layer
• A porous internal structure where blood vessels once passed
• Distinctive bone texture that differs from surrounding sediment
• Mineralised preservation often replacing the original bone material

Over millions of years, the original bone material becomes permineralised, meaning minerals such as silica or calcite fill the microscopic spaces within the bone. This process preserves the overall structure of the bone while transforming it into stone.

Fragments such as this specimen can represent pieces of larger skeletal elements from dinosaurs that lived in nearby terrestrial environments during the Jurassic.

A Genuine British Dinosaur Fossil with Premium Certificate

This specimen represents a rare opportunity to own a genuine piece of dinosaur bone from the Upper Jurassic of the United Kingdom, originating from a well-known geological formation.

Key features of this fossil include:

• Genuine dinosaur bone fossil fragment
• Very rare British dinosaur fossil material
• Geological formation: Kimmeridge Clay Formation
• Age: Upper Jurassic, Kimmeridgian Stage
• Locality: Abingdon, Oxfordshire, United Kingdom
• Rare terrestrial vertebrate fossil preserved in marine sediments
• The exact specimen shown in the photographs
• Includes a fully hand-signed Premium Certificate of Authenticity

Fossils from the Kimmeridge Clay provide a fascinating window into the marine environments of the Late Jurassic, while rare dinosaur remains such as this connect those ancient seas to the land ecosystems where dinosaurs once roamed. This specimen represents a remarkable and authentic piece of prehistoric life from approximately 155 million years ago.