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 Shafts  Index  Shafts 

Mainsforth Colliery

An Account of Strata sunk through in the B or 14 feet diameter Pit, at Mainsforth Colliery

Shaft Details

Shaft diameter: 14' 0", Closed: 06 Dec 1968

Approximate surface level 275 feet above sea (Ordnance datum)

Switch to measurements in:  fathoms, feet & inches, or metres






















































































































































































































Geology encountered   Thickness   Depth
  ft. in.   ft. in.
Soil    1  0     1  0
Strong blue clay    10  0     11  0
Soft brown limestone, with water    22  0     33  0
Strong brown limestone, water at bottom    9  0     42  0
Mild limestone    19  0     61  0
Light coloured limestone    14  0     75  0
Mild limestone, with a strong feeder of water at the top    7  0     82  0
Hard limestone    3  0     85  0
Mild limestone, with water    16  6     101  6
Hard brown limestone, much honeycombed    23  4     124  10
Hard brown limestone, with partings and water    27  5     152  3
Very hard brown and white limestone, with water    8  0     160  3
Blue limestone, mixed with white    2  3     162  6
Brown limestone, with a little water at parting    2  9     165  3
Mixed panels of blue and brown limestone    14  3     179  6
Hard blue limestone, with brown girdles    14  4     193  10
Hard blue limestone, with l ight blue and yellow partings    8  0     201  10
Blue limestone, with thin black partings    13  2     215  0
Brown limestone, with thin black partings    1  8     216  8
Light coloured limestone, with a strong feeder of water at bottom    0  8     217  4
Grey metal    2  5     219  9
Hard sandstone, soft at bottom    3  5     223  2
Soft light coloured metal    7  8     230  10
Light metal, mixed with red pebbles    2  3     233  1
Red metal    2  9     235  10
Red post    2  8     238  6
Grey post    9  8     248  2
Grey metal    6  4     254  6
Blue metal, mixed with thin red girdles    4  8     259  2
Grey metal, with thin red girdles    11  0     270  2
Dark blue metal    4  8     274  10
Black stone    0  2     275  0
Black stone    1  11     276  11
Seggar    0  3     277  2
COAL - Three-Quarter Seam    2  8     279  10
Soft seggar    1  4     281  2
Strong seggar, with iron balls    3  0     284  2
Strong grey metal, jointy    8  8     292  10
Grey post    1  6     294  4
Grey metal, with post girdles    4  7     298  11
Black metal    1  8     300  7
Dark grey metal    3  0     303  7
Grey metal, with post girdles    9  0     312  7
Blue metal, with iron girdles    4  2     316  9
Black stone    0  5     317  2
COAL - Five-Quarter Seam    4  6     321  8
Seggar    1  8     323  4
Post    1  10     325  2
Black stone    2  0     327  2
Grey metal, with post girdles    16  0     343  2
Grey metal    12  1     355  3
COAL    1  9     357  0
Thill stone    0  4     357  4
Grey post    4  1     361  5
Hard post girdle    1  0     362  5
Grey metal, with thin post girdles    16  0     378  5
Grey metal, with iron girdles    8  4     386  9
COAL - Main Coal Seam    9  4     396  1
    COAL, top    1         
    Seggar    4  2       
    COAL, bottom    3  8       
Seggar    2  8     398  9
Grey post    3  10     402  7
Light grey metal, much like seggar    1  3     403  10
Grey post, with grey metal partings    5  8     409  6
Grey post    3  5     412  11
Grey metal post, mixed with iron balls at bottom    3  9     416  8
Blue metal, with iron balls and coal pipes and prints    3  1     419  9
Dark metal, with coal pipes and prints    0  7     420  4
Grey metal, with iron balls    2  11     423  3
Grey nmetal, with post girdles    2  0     425  3
White post, with metal partings and water    1  8     426  11
Brown whin girdles    0  4     427  3
Grey post, with metal partings    1  4     428  8
White post, with metal partings and water    13  5     442  1
Seggar    0  8     442  9
Black stone, mixed with coal pipes and prints    0  2     442  11
Grey metal and post girdles    24  4     467  3
Grey metal, with coal partings    1  5     468  8
COAL    4  3     472  11
    Black stone, mixed with coal    0         
    COAL    4         
Seggar, with ironstone nodules    3  0     475  11
Grey metal and post girdles    13  3     489  2
COAL, coarse    0  6     489  8
Dark blue metal    2  6     492  2
Blue metal and ironstone balls    2  6     494  8
Grey metal and post girdles    2  0     496  8
Grey post and metal partings    21  9     518  5
Grey metal and ironstone balls    20  10     539  3
COAL - Low Main Seam    2  3     541  6
    Black stone and coal pipes    0         
    COAL    2         
Dark thill stone    0  4     541  10
Fine light coloured seggar    1  4     543  2
Dark and light coloured seggar in thin layers    2  3     545  5
COAL, thin and coarse    0  4     545  9
* Hard post, like seggar, with iron balls    2  8     548  5
* Strong grey metal, inclining to post    5  9     554  2
White post, with metal partings, mixed with whin next to top, and with strong leafy post the last 2 fathoms, and 400 gallons of water per hour    27  9     581  11
COAL    2  1     584  0
    Soft black metal, with coal pipes    0  8       
    COAL (got May 16th, 1876)    1  5       
Dark grey post, with post girdles    9  8     593  8
Strong black metal    1  0     594  8
COAL    0  7     595  3
Strong grey metal, inclining to post    8  5     603  8
White post girdle    1  9     605  5
Grey metal    0  8     606  1
White post, mixed with leafy post    16  10     622  11
Grey metal and ironstone girdles    7  9     630  8
COAL - Hutton Seam    2  0     632  8
    COAL (got July 13th, 1876)    2         
Seggar, strong at bottom    1  6     634  2
Grey metal, with post girdles    13  4     647  6
Hard jointy grey post, about 80 gallons of water per minute    7  8     655  2
Grey metal and post girdles    2  10     658  0
Black mussel bed    0  4     658  4
Grey metal, with iron balls    0  7     658  11
Black stone    0  5     659  4
Grey metal, mixed with pieces of ironstone    6  4     665  8
COAL (Jan. 24th, 1877)    2  4     668  0
Dark thill    0  9     668  9
Seggar, strong at the bottom    4  0     672  9
Grey metal    12  10     685  7
Dark metal    0  8     686  3
COAL    0  1     686  4
Dark seggar, mixed with iron balls    5  6     691  10
Grey metal, with iron balls, post girdles, and a few prints (a leader of fault here, downthrow South 2½ inches)    21  9     713  7
White post, with a little water    9  3     722  11
Light grey metal    0  3     723  2
COAL    1  1     724  3
    COAL    0  2       
    COAL, mixed with black stone    0  11½       
Seggar    0  2     724  6
Dark grey post, with thin white post girdles    8  1     732  7
White post, with a little water    2  9     735  4
Dark grey leafy post    3  2     738  6
Dark metal, with iron girdles    5  0     743  6
COAL, slaty (dips east, 9 in. to the yard)    0  2     743  8
Dark seggar, with ironstone balls    3  0     746  8
Strong grey metal, like post, with hard white post girdles    18  4     765  0
White post, mixed with whin and a little water    12  8     777  8
Dark metal    1  8     779  4
Grey metal, with ironstone girdles    7  4     786  8
Dark metal, with ironstone pebbles    7  0     793  8
Seggar    1  0     794  8
Mild grey post, like seggar next top    7  6     802  2
White post, mixed with whin, and 120 gallons of water per minute (there is a good deal of gas in this post)    38  10     841  0
Grey metal, mixed with ironstone    4  5     845  5
Post girdles    0  2     845  7
Grey metal, with ironstone girdles    2  7     848  2
Grey mottled stone    0  3     848  5
COAL - Harvey Seam    5  1     853  6
    COAL (June, 1877)    1         
    Stone band seggar    0  4       
    COAL    2  2       
Bored further :—    0  0     853  6
Seggar    3  2     856  8
Grey metal    2  4     859  0
Black stone    0  3     859  3
Seggar    1  9     861  0
Black stone and seggar in thin layers    0  7     861  7
Seggar    3  9     865  4
Strong grey post, with metal partings    12  0     877  4
Strong grey metal and post girdles    49  1     926  5
Grey metal, with water and gas    0  5     926  10
Hard white post    1  10     928  8
Grey metal, with post girdles    16  9     945  5
Hard white post    28  4     973  9
Hard grey post    3  8     977  5
Hard white post    13  5     990  10
Strong grey metal, with post girdles    16  9     1007  7
Dark grey metal    0  10     1008  5
COAL    1  10     1010  3
    COAL    1         
    Brown band    0         
    COAL    0  7       
Grey metal    1  10     1012  1
Dark grey metal    2  7     1014  8
Strong grey metal    11  10     1026  6
Black metal    0  2     1026  8
COAL    4  10     1031  6
    COAL    2  8       
    Dark grey metal, with scares of coal    0  11       
    COAL, with danty partings    1  3       
Strong grey metal    2  8     1034  2
Dark grey metal    5  3     1039  5
Hard grey post    4  5     1043  10
Hard white post    13  5     1057  3
Strong light grey metal    10  2     1067  5
Soil    0  4     1067  9
Light grey metal    1  3     1069  0
Black metal, with a little coal    0  10     1069  10
Hard white post and metal partings    10  2     1080  0
Strong grey metal    7  3     1087  3
COAL    0  4     1087  7
Strong grey metal, with post girdles    12  2     1099  9
Strong grey post    4  5     1104  2
Hard white post    3  1     1107  3
Strong grey metal    5  9     1113  0
Dark grey metal    3  2     1116  2
COAL    5  6     1121  8
    COAL    0  10½       
    Soft brown shale band    0         
    COAL, hard splint    0  3       
    Dark shale band, with scares of coal    0  4       
    COAL, with thin shale partings    0  9       
    Black shale, with much coal    0  3       
    COAL    0  6       
    COAL, cannel    0  3       
    COAL, good    1  3       
    Band    0  2       
    COAL, good    0  3       
    COAL, coarse, and shale partings    0         
    Dark shale band, with scares of coal    0         
    COAL, with shale    0  3       
Very dark grey metal, with post girdles    12  2     1133  10
COAL    0  4     1134  2
Hard grey post    1  4     1135  6
* Standing set bunton left upon this crib; walling crib at the bottom of this 2 fs. 2 ft. 6in.    0  0     1135  6

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 1314 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"

  main page for Mainsforth Colliery

 


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