Magnesian limestone/Bowland Shale Formation and Craven Group separation map

Area where aquifer and shale/clay are present	East Midlands Lincolnshire Yorkshire Note that for the purposes of drafting this separation map the maximum depth of the Magnesian limestone 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	About 100 to 1800 m.
Lithology of intervening strata	Mixed permeability Millstone Grit Group and Pennine Coal Measures Group (mudstone, siltstone and sandstone)
Other major aquifers in the area	Chalk; Lower Greensand; Spilsby Sandstone; Corallian limestone; Oolites; Triassic sandstone (all above) Carboniferous limestone (below)
Other shales or clays in the area	Kimmeridge Clay Formation; Ampthill Clay Formation; Kellaways Formation; Oxford Clay Formation; Osgodby Formation; Lias Group (all above)
Aquifer map	Magnesian limestone principal aquifer
Shale/clay map	Bowland Shale Formation and Craven Group shale/clay unit

Need more information?