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The Oxford Clay (or Oxford Clay Formation) is a Jurassic marine sedimentary rock formation underlying much of southeast England, from as far west as Dorset and as far north as Yorkshire. The Oxford Clay Formation dates to the Jurassic, specifically, the Callovian and Oxfordian ages, [ 1 ] and comprises two main facies .
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The outcrop known as Headington stone was quarried at Headington Quarry on the outskirts of Oxford and used for many of the historic University buildings there. Hilly outcrops above this corallian ridge, composed of Lower Greensand , occur at Badbury Hill , Faringdon (Folly Hill) and Boars Hill .
Peloneustes is known from the Peterborough Member (formerly known as the Lower Oxford Clay) of the Oxford Clay Formation. [2] While Peloneustes has been listed as coming from the Oxfordian stage (spanning from about 164 to 157 million years ago [ 1 ] ) of the Upper Jurassic, [ 7 ] the Peterborough Member actually dates to the Callovian stage ...
[7] [17] The Oxford Clay Formation is a marine deposit of southern and middle England, known for the high-quality preservation of some fossils and the large diversity of taxa. [17] Sediments are generally brownish-grey mudstone, organic-rich with plentiful crushed ammonites and bivalves, at most 65 m (213 ft) thick. [38]
The later Kellaways and Oxford Clay formations and Ampthill Clay formations all assigned to the Ancholme Group of middle ... Wikipedia® is a registered trademark ...
Clay bands (e.g. the Fuller's Earth Clay at the base of the Great Oolite Series) represent deeper water periods. As the Cotswold dip-slope is followed toward the south-eastern county extremities these clays and mudstones begin to predominate as the Upper Jurassic period Oxford Clay.
Weald Clay: Cretaceous: Weald Clay Group / Lower Weald Clay: Cretaceous: Weald Clay Group / Upper Weald Clay: Cretaceous: Wealden Formation: Cretaceous: Wealden Group / Ashdown Formation: Cretaceous: Wealden Group / Tunbridge Wells Sand Formation: Cretaceous: Wealden Group / Vectis Formation: Cretaceous: Wealden Group / Wadhurst Clay ...