Shafts	Index	Shafts

Geology encountered   Thickness   Depth   ft. in.   ft. in. Gravel    8  0     8  0 Clay    4  0     12  0 Gravel    13  9     25  9 Freestone post    37  5     63  2 COAL - High Main Seam    6  0     69  2 Grey metal and post girdles    30  3     99  5 COAL - Metal Coal Seam    4  0     103  5 Blue metal    23  4     126  9 COAL - Stone Coal Seam    1  8     128  5 Fire clay    2  0     130  5 Blue metal    31  11     162  4 COAL    1  10     164  2 Fire clay    1  10     166  0 White post, with water    33  1     199  1 COAL - Yard Seam    3  0     202  1 Fire clay    4  6     206  7 Grey metal    38  1     244  8 White post    10  11     255  7 COAL - Bensham Seam    3  2     258  9 Blue metal    12  8     271  5 White post, with water    54  8     326  1 Fire clay    5  0     331  1 COAL - 6/4 or Maudlin Seam    3  6     334  7 Blue metal    18  3     352  10 COALщ5/4 Seam    2  6     355  4 Blue metal and post girdles    28  2     383  6 White post, with water    25  5     408  11 Blue metal    3  0     411  11 COAL - Low Main or Hutton Seam    5  10     417  9

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 1800 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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