Shafts	Index	Shafts

Geology encountered   Thickness   Depth   ft. in.   ft. in. Strong brown clay    68  7     68  7 Sand, clay, and metal    3  0     71  7 Blue metal    41  9     113  4 Strong grey metal    9  0     122  4 Blue metal    7  9     130  1 Limestone - Eight-Yard Stone    19  8     149  9 COAL, thin, and thill    1  0     150  9 Freestone    12  0     162  9 COAL    0  6     163  3 Grey metal and freestone girdles    32  11     196  2 Freestone    22  0     218  2 Metal and ironstone (= Brinkburn Ironstone Shale)    20  9     238  11 Limestone - Six Yard Stone    21  0     259  11 COAL    0  5     260  4 Thill    3  0     263  4 Blue metal    12  8     276  0 Limestone - Little Limestone    1  3     277  3 Blue metal    9  5     286  8 Impure limestone - Red Bed    13  0     299  8 Blue metal    13  10     313  6 COAL - Shilbottle Seam    2  10     316  4 Thill    3  0     319  4 Metal and freestone girdles    4  0     323  4

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 1301 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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