Shafts	Index	Shafts

Geology encountered   Thickness   Depth   ft. in.   ft. in. Brown clay (no stones)    12  6     12  6 Gravel    1  10     14  4 Loamy clay (no stones)    24  0     38  4 Fine blue clay (no stones)    39  8     78  0 Loamy clay (no stones)    30  0     108  0 Strong stony dark clay    18  4     126  4 Limestone (part of Six-Yard Stone)    6  0     132  4 COAL    0  5     132  9 Thill and marl    16  7     149  4 Blue metal    9  0     158  4 Limestone - Little Limestone    1  6     159  10 Strong grey metal    9  10     169  8 Impure limestone - Red Bed    5  0     174  8 Post girdles    5  2     179  10 Post    9  8     189  6 Blue metal    8  6     198  0 COAL - Shilbottle Seam    2  11     200  11

Source: An Account of the strata of Northumberland & Durham as proved by Borings & Sinkings, Volume L-R, published by the North of England Institute of Mining & Mechanical Engineers, 1887

  original entry for sinking/boring number 1300 in "An Account of the strata of Northumberland & Durham as proved by Borings & Sinkings, Volume L-R, published by the North of England Institute of Mining & Mechanical Engineers, 1887"

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