Chichester & Bognor district map pack - Sheet Explanation for sheet E317 plus 1:50 000 (S&D) map [Booklet and Map Pack]

Chichester & Bognor district map pack - Sheet Explanation for sheet E317 plus 1:50 000 (S&D) map [Booklet and Map Pack]

This pack contains a Sheet Explanation for the district and the complementary 1:50 000 scale Bedrock Geology and Superficial Deposits map (folded). Sheet Explanations provide a brief description and interpretation of the geology of the relevant map sheet area.

The A5 Sheet Explanation booklet and the map are supplied in a transparent wallet. While it is possible to buy the map and Sheet Explanation separately, buying them together as map pack saves you £3.

The Chichester and Bognor district lies on the south-western edge of the Weald, stretching from the South Downs to the coast at Selsey Bill. Geologically, it lies within the Wessex basin, on the southern limb of the Wealden Anticlinorium. The oldest formations known to be present at depth are of Devonian and Carboniferous age, but the main period of basin development and sedimentary deposition occurred during the Mesozoic, and a thick sequence of Jurassic strata underlies the Cretaceous rocks that outcrop at the surface. Sedimentary deposition was eventually terminated in mid-Cainozoic times, when extensive earth movements resulted in the formation of a series of large en échelon folds, each marking major faults at depth.

This brief account describes the geology of the district. The oldest exposed strata are part of the Lower Cretaceous Wealden 'Group'. Passing south, these are successively overlain by the Lower Greensand Group, Gault and Upper Greensand formations and the Upper Cretaceous Chalk Group. Cainozoic (Palaeogene) strata underlie the broad coastal plain, and include the Reading Formation, London Clay Formation and the Bracklesham Group. [Booklet and Map Pack]

Author Aldiss D T

Format Booklet and Map Pack

Sheet(s) Covered E317

Year Published 2003

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Sheet Explanation Front Cover


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