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Geology of West Sussex : ウィキペディア英語版 | Geology of West Sussex : ''This article describes the geology of the ceremonial county of West Sussex. The geology of the city of Brighton and Hove is described within the Geology of East Sussex'' The geology of West Sussex in southeast England comprises a succession of sedimentary rocks of Cretaceous age overlain in the south by sediments of Palaeogene age. The sequence of strata from both periods consists of a variety of sandstones, mudstones, siltstones and limestones. These sediments were deposited within the Hampshire and Weald basins. Erosion subsequent to large scale but gentle folding associated with the Alpine Orogeny has resulted in the present outcrop pattern across the county, dominated by the north facing chalk scarp of the South Downs. The bedrock is overlain by a suite of Quaternary deposits of varied origin. Parts of both the bedrock and these superficial deposits have been worked for a variety of minerals for use in construction, industry and agriculture. 〔British Geological Survey 1:625,000 scale geological map ''Bedrock Geology UK South'' 5th Edn. NERC 2007〕 ==Jurassic and older rocks == A sequence of sedimentary rocks of Jurassic age has been proved to underlie the Cretaceous succession but nowhere within the county does it appear at the surface. Beneath these again, boreholes have proven Devonian and Carboniferous rocks and possible Permo-Triassic strata.〔British Geological Survey 1:50,000 scale map (England and Wales) sheet 317/322 ''Chichester/Bognor''〕
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