A geological model of the chalk of East Kent

Aldiss, D.T.; Bloomfield, J.R. ORCID:; Buckley, D.K.; Doran, S.K.; Evans, D.J.; Hopson, P.M.; Royse, K.R.; Woods, M.A.. 2004 A geological model of the chalk of East Kent. Nottingham, UK, British Geological Survey, 160pp. (CR/04/092N) (Unpublished)

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This report describes the geological modelling of the Chalk in the North Downs of East Kent, within the catchment of River Great Stour and eastwards to the coast, including the Isle of Thanet. This work was funded by the Environment Agency to support investigations of the local hydrogeology and thereby to enhance catchment management. The whole area is underlain by the Upper Cretaceous Chalk Group, with the Palaeogene succession of the Thanet Sand Formation, the Lambeth Group and the Thames Group overlying it in the northern and central eastern parts. The project included a desk study revision of the Chalk of the North Downs, using the new Chalk lithostratigraphy. The revisions to the geology are shown on the 1:50 000 scale geological map which accompanies this report. Together with evidence from boreholes and from seismic surveys, the new outcrop patterns have been incorporated into a geological model, using both computer software (EarthVision) and manual methods. The introduction describes the background to the project. The second chapter describes the sources for the data used in the model: published and unpublished geological maps, borehole records (both lithological and geophysical), seismic surveys, biostratigraphic records, digital topographic information, and the published literature. Each Chalk formation present in the area is then briefly described in the third chapter, noting its relationship to the older lithostratigraphic divisions, and to biostratigraphic zones. The local Chalk succession extends from the base of the Chalk Group to the Newhaven Chalk Formation, here represented by the Margate Chalk Member. Evidence for the thickness of each formation is reviewed. The early Palaeogene formations (the Thanet Sand, Upnor, Harwich and London Clay formations) are also briefly described (Chapter 4) and the local superficial deposits mentioned, with references to detailed descriptions (Chapter 5). Apart from minor adjustments to the outcrop of the basal Palaeogene surface, no revision of these formations was done for this study.

Item Type: Publication - Report
Programmes: BGS Programmes > Geology and Landscape Southern
Funders/Sponsors: Environment Agency
Additional Information. Not used in RCUK Gateway to Research.: This item was internally reviewed but not externally peer-reviewed. This report made open by author July 2014
Date made live: 09 Feb 2015 10:33 +0 (UTC)

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