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 Shafts  Index  Shafts 

Hartley Colliery

Mill Pit

Account of the different Strata met with in sinking the Mill Pit, Hartley Colliery. Begun October 16th, 1830

Shaft Details

Sunk: 16 Oct 1830

Approximate surface level 111 feet above sea (Ordnance datum)

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






















































































Geology encountered   Thickness   Depth
  ft. in.   ft. in.
Outset    12  4     12  4
Soil    1  6     13  10
Clay and sand    13  0     26  10
COAL    2  0     28  10
Thill    1  0     29  10
Grey metal stone    6  6     36  4
Post girdles    1  6     37  10
Grey metal stone, with post girdles    6  0     43  10
White Post    3  0     46  10
Whin    0  4     47  2
White post    4  8     51  10
Grey metal stone    0  6     52  4
Strong white post    4  0     56  4
Grey metal stone    15  6     71  10
COAL, with metal bands    2  2     74  0
Thill    3  0     77  0
Grey metal stone    4  0     81  0
Post, with grey metal stone partings    9  0     90  0
Post, with grey metal stone partings    13  2     103  2
Grey metal stone    3  6     106  8
COAL    3  4     110  0
Thill    1  6     111  6
Grey metal stone    1  1     112  7
White post, with girdles    2  11     115  6
Blue metal partings    0  3     115  9
Post    2  3     118  0
Dark blue metal, with ironstone    0  5     118  5
COAL, ground    1  3     119  8
Thill    1  9     121  5
Grey metal    8  5     129  10
Blue metal, with ironstone girdles    10  9     140  7
Black stone    1  3     141  10
Clay parting    0  1     141  11
Soft grey metal    1  5     143  4
Black stone    1  0     144  4
COAL, with metal bands    0  6     144  10
Soft thill    4  6     149  4
Blue and grey metal, with whin balls (about 1 stroke per minute to here, 12 in. barrel)    13  10     163  2
Post or granite (6 fathoms of which is exceedingly hard and porous, with gullets, where strong feeders of water were got; various feeders were wedged hack, sometimes amounting to 800 gallons per minute ; 7 fathoms of metal).    0  0     163  2
Tubbing put in    66  6     229  8
Grey metal, with post girdles    2  9     232  5
White post    1  4     233  9
Grey metal, with post girdles    5  2     238  11
Dark grey metal, with ironstone girdles    7  2     246  1
White post    1  6     247  7
Grey metal, with post girdles    7  3     254  10
COAL    5  1     259  11
    COAL    1  7       
    Dark grey metal band    1  7       
    COAL    1  11       
Grey metal, with post girdles    11  6     271  5
White post    1  6     272  11
Grey whin    0  10     273  9
Brown whin    2  6     276  3
Grey metal, with post girdles    3  4     279  7
Dark grey metal, with ironstone girdles    5  4     284  11
Post girdles    0  6     285  5
Dark grey metal    4  10     290  3
Mussel scalp    0  3     290  6
Dark grey metal    6  0     296  6
White girdle (a little water.)    0  7     297  1
Grey metal    4  2     301  3
Post girdle    0  10     302  1
Grey metal, with ironstone girdles    10  0     312  1
Black stone    0  9     312  10
COAL - Main Coal Seam (water to here about 100 gallons per minute)    4  6     317  4
Thill    0  3     317  7
COAL, ground    2  1     319  8
Grey metal    0  8     320  4
Post, with metal    8  0     328  4
Bored further:—    0  0     328  4
Grey post    9  11     338  3
Dark grey metal, with post girdles    27  3     365  6
Grey metal    2  9     368  3
Dark grey metal, with post girdles    10  0     378  3
COAL, foul, mixed with bands (12 inclues black at top)    6  0     384  3
Grey metal thill    6  9     391  0
Grey post    14  4     405  4
Dark grey metal, with post girdles    32  0     437  4

Source: An Account of the strata of Northumberland & Durham as proved by Borings & Sinkings, Volume F-K, published by the North of England Institute of Mining & Mechanical Engineers, 1885

  original entry for sinking/boring number 1069 in "An Account of the strata of Northumberland & Durham as proved by Borings & Sinkings, Volume F-K, published by the North of England Institute of Mining & Mechanical Engineers, 1885"

  main page for Hartley Colliery

 


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