Shafts	Index	Shafts

Geology encountered   Thickness   Depth   ft. in.   ft. in. Freestone    108  0     108  0 Black metal    3  0     111  0 COAL, mixed with black metal    0  2     111  2 Limestone    10  0     121  2 Grey freestone    51  0     172  2 Roof stone, strong blue metal    2  0     174  2 COAL, clean - supposed Hobberlaw Seam (sometimes only 20 inches)    2  4     176  6 Sumped:—    0  0     176  6 Grey freestone    18  0     194  6 COAL    1  6     196  0

Source: An Account of the strata of Northumberland & Durham as proved by Borings & Sinkings, Volume C-E, published by the North of England Institute of Mining & Mechanical Engineers, 1881

  original entry for sinking/boring number 0730 in "An Account of the strata of Northumberland & Durham as proved by Borings & Sinkings, Volume C-E, published by the North of England Institute of Mining & Mechanical Engineers, 1881"

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