... Home Energy Shale gas Aquifers and shales Aquifer/shale separation maps Lower Greensand/Kimmeridge Clay and Ampthill Clay formations separation map

Lower Greensand/Kimmeridge Clay and Ampthill Clay formations separation map

Lower Greensand/Kimmeridge Clay and Ampthill Clay formations separation map

Area where aquifer and shale/clay are present
  • East and central Lincolnshire
  • Norfolk to Dorset
  • Around the Weald
  • Note that, for the purposes of drafting this separation map the maximum depth of the Chalk aquifer is taken to be 400 mbgl based on the recommendations in the UK TAG report. More information about this can be found in the methods section
Thickness of intervening strata
  • East and central Lincolnshire: up to 200 m
  • West Norfolk: up to 50 m, decreasing to 0 m eastwards and southwards and into Cambridgeshire and Bedfordshire
  • Southern England: 0 m in parts of Wiltshire, Berkshire, Oxfordshire and Buckinghamshire up to 1350 m around Weald and southern part of Isle of Wight
Lithology of intervening strata
Other major aquifers in the area
  • East and central Lincolnshire: Chalk (above); Oolites; Triassic sandstone; Magnesian limestone; Carboniferous limestone (all below)
  • Norfolk to Bedfordshire: Crag; Chalk (both above); Oolites; Triassic sandstone; Carboniferous limestone (all below)
  • Southern England including Oxfordshire and Buckinghamshire: Chalk (above); Corallian Group limestone; Oolites; Triassic sandstone; Permian sandstone; Carboniferous limestone (all below)
Other shales or clays in the area
Aquifer map
Shale/clay map

 

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Lower Greensand/Kimmeridge Clay and Ampthill Clay formations separation map. BGS © UKRI.

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