Shafts	Index	Shafts

Geology encountered   Thickness   Depth   ft. in.   ft. in. Grey metal    3  8     3  8 Whin girdle    0  10     4  6 COAL, soft    0  9     5  3 Black shale, with iron balls    11  0     16  3 COAL - Three-Quarter Seam    2  3     18  6 Clay, mixed with iron balls    3  9     22  3 COAL    0  1     22  4 Clay, mixed with iron balls    1  2     23  6 White post    1  0     24  6 Whin    2  6     27  0 Blue metal, with partings    9  10     36  10 COAL    0  1½     36  11½ Blue metal, with post girdles    10  4     47  3½ COAL    0  9     48  0½ Blue metal    2  0     50  0½ COAL - Brockwell Seam    2  11     52  11½

Source: An Account of the strata of Northumberland & Durham as proved by Borings & Sinkings, Volume A-B, published by the North of England Institute of Mining & Mechanical Engineers, 1878

  original entry for sinking/boring number 0242 in "An Account of the strata of Northumberland & Durham as proved by Borings & Sinkings, Volume A-B, published by the North of England Institute of Mining & Mechanical Engineers, 1878"

  main page for Blaydon Main Colliery