Shafts	Index	Shafts

Geology encountered   Thickness   Depth   ft. in.   ft. in. Outset    25  8     25  8 Mild brown clay    19  7     45  3 Sand, with water    3  6     48  9 Strong brown clay    39  0     87  9 Grey metal    15  6     103  3 Brown post, mixed with white post    5  1     108  4 Grey metal with scamy post girdles    9  8     118  0 Grey metal with scamy post girdles    2  1     120  1 Strong grey post    0  9     120  10 Grey metal, with post girdles    7  3     128  1 COAL    2  4     130  5 Thill    2  0     132  5 Grey metal    2  8     135  1 Grey post, with partings    3  0     138  1 Strong white post    27  0     165  1 Strong white post, mixed with coal pipes    4  0     169  1 Grey metal, with post girdles    13  0     182  1 COAL    0  7     182  8 Grey metal    2  6     185  2 White post, with partings    6  0     191  2 Grey metal    11  0     202  2 Black metal    6  6     208  8 COAL    1  0     209  8 Grey metal, with post girdles    12  6     222  2 Strong metal, with post girdles and whin girdles    30  0     252  2 COAL - High Main Seam    3  3     255  5

Source: An Account of the strata of Northumberland & Durham as proved by Borings & Sinkings, Volume S-T, published by the North of England Institute of Mining & Mechanical Engineers, 1894

  original entry for sinking/boring number 1691 in "An Account of the strata of Northumberland & Durham as proved by Borings & Sinkings, Volume S-T, published by the North of England Institute of Mining & Mechanical Engineers, 1894"

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