Shafts	Index	Shafts

Geology encountered   Thickness   Depth   ft. in.   ft. in. Moss and clay    12  0     12  0 Slate sill    29  6     41  6 Plate, with metal posts    12  0     53  6 Cockle Bed Limestone    14  6     68  0 Plate    26  6     94  6 Fell Top Limestone    4  6     99  0 COAL    1  0     100  0 Girdle beds    6  0     106  0 Plate    15  0     121  0 Hipple Sill    35  0     156  0 Plate    38  0     194  0 High Grit Sill (lead bearing)    83  0     277  0 Black bed and plate    3  0     280  0 Low Grit Sill (lead bearing)    142  0     422  0 Black bed    1  0     423  0 Limestone    3  0     426  0 Crag Sill (lead bearing)    48  0     474  0 Plate and limestone    10  0     484  0 Pattinson's Sill    29  0     513  0 Plate    35  0     548  0 Hazle, or white sill    8  0     556  0 Plate    12  0     568  0 Hazle    5  6     573  6 Plate    12  0     585  6 Little Limestone    11  0     596  6

Source: An Account of the strata of Northumberland & Durham as proved by Borings & Sinkings, Supplement, published by the North of England Institute of Mining & Mechanical Engineers, 1910

  original entry for sinking/boring number 2786 in "An Account of the strata of Northumberland & Durham as proved by Borings & Sinkings, Supplement, published by the North of England Institute of Mining & Mechanical Engineers, 1910"

  main page for Derwent Mines (Lead Ore)