Triassic sandstone/Upper Cambrian shales separation map

Area where aquifer and shale/clay are present	Margins of the Carboniferous basin between Coventry and Tamworth (Warwickshire Coalfield) Note that for the purposes of drafting this separation map the maximum depth of the Triassic sandstone 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	Up to 1300 m
Lithology of intervening strata	Low permeability Tremadoc sediments; mixed permeability Pennine Coal Measures Group (mudstone, siltstone and sandstone)
Other major aquifers in the area	None
Other shales or clays in the area	None
Aquifer map	Triassic sandstone principal aquifer
Shale/clay map	Upper Cambrian shales shale/clay unit

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