... Home Energy Shale gas Aquifers and shales Aquifer/shale separation maps Lower Greensand/Kellaways, Oxford Clay and Osgodby formations separation map

Lower Greensand/Kellaways, Oxford Clay and Osgodby formations separation map

Lower Greensand/Kellaways, Oxford Clay and Osgodby Formation 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
  • South Lincolnshire: about 300 to 450 m
  • Norfolk: up to about 200 m, decreasing south and eastwards to up to 50 m in Cambridgeshire and Bedfordshire
  • Southern England: up to 1700 m, greatest adjacent to the Weald and on Isle of Wight
Lithology of intervening strata
Other major aquifers in the area
  • South Lincolnshire: Chalk (above); Oolites; Triassic sandstone; Magnesian limestone; Carboniferous limestone (all below)
  • Norfolk, Cambridgeshire and Bedfordshire: Crag; Chalk (both above); Oolites; Triassic sandstone; Carboniferous limestone (all below)
  • Southern England including Oxfordshire and Buckinghamshire: Chalk (above); 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/Kellaways, Oxford Clay and Osgodby formations separation map. BGS © UKRI.

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