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Summary statistics of vertical separations for both pairs of aquifers and shales. OD relative to Ordnance Datum; SD standard deviation
| Aquifer/shale pair | Area (km2) | Min. separation (m) | Max. separation (m) | Mean separation (m) | SD of separation data (m) |
|---|---|---|---|---|---|
| Chalk Group/Kimmeridge | 12,996 | 0 | 1,239 | 229 | 259 |
| Triassic sandstone/Bowland Shale Formation | 6,255 | 0 | 3,935 | 1,207 | 746 |
