Durham Mining Museum - Hetton Colliery Shaft Details (original) (raw)

Geology encountered Thickness Depth
fms. ft. in. fms. ft. in.
Outset 1 0 0 1 0 0
Soil 0 2 0 1 2 0
Sand 1 3 0 2 5 0
Gravel 0 4 0 3 3 0
Limestone marl and soft limestone to where the pit is walled 3 0 0 6 3 0
Yellow limestone of various descriptions 15 5 6 22 2 6
Limestone of a blue grey colour, called the "blue rag" in these flags near the bottom 7 2 2 29 4 8
(N.B.�The water increased regular from the depth of about 16 fathoms to the bottom of the limestone to about 2,000 gallons per minute.)
Blue metal 0 5 2 30 3 10
Very soft sandstone (stratified) and was drawn by the pumps 0 4 4 31 2 2
Very soft white post 0 1 2 31 3 4
Grey scamy metal stone, and where the first three wedging cribs were laid 0 0 9 31 4 1
Strong brown limestone, like whin 1 2 8 33 0 9
Blue grey metal, very soft, with a little water 5 2 3 38 3 0
COAL, mixed with black metal, and the last wedging crib laid on the grey metal below it . -. 0 1 4 38 4 4
Grey metal stone 0 4 8 39 3 0
Blue metal 1 3 0 41 0 0
COAL, mixed with black metal 0 1 9 41 1 9
Grey metal stone, with partings and water 2 5 10 44 1 7
COAL 0 3 9 44 5 4
COAL 1 0
Grey metal 0 4
COAL, mixed with black metal 0 7
COAL 1 10
Drift through to the Minor Pit.
Grey metal stone or sill 0 1 4 45 0 8
Grey metal stone, with partings 4 0 10 49 1 6
Strong white post, with water near bottom and spongy 3 1 8 52 3 2
COAL - Three-Quarter Seam 0 2 4 52 5 6
COAL, wet 2 4
Drift to Minor Pit. 0 0
Sill stone 0 1 6 53 1 0
White post 0 2 3 53 3 3
Grey metal 1 2 5 54 5 8
Strong white post, and water in several places, which is wedged off and piped into the 3/4 Coal Seam 6 3 3 61 2 11
Grey metal stone 0 2 8 61 5 7
COAL, mixed with black metal 0 1 6 62 1 1
Sill stone 0 0 8 62 1 9
White post 0 2 5 62 4 2
Grey metal 0 2 2 63 0 4
Post girdles 0 1 4 63 1 8
Grey metal 0 0 6 63 2 2
COAL 0 0 10 63 3 0
Sill stone 0 0 3 63 3 3
Grey metal stone 0 0 10 63 4 1
White post, with partings at 8 feet down, and wedged 1 4 2 65 2 3
Grey metal stone, inclining to post 0 2 9 65 5 0
Soft black and blue metal 1 5 10 67 4 10
COAL and a drift through to Minor Pit 0 0 3 67 5 1
Sill stone 0 1 3 68 0 4
White post 1 1 9 69 2 1
Grey and white post, mixed with grey metal 1 5 2 71 1 3
Whin 0 3 7 71 4 10
White post and partings of blue metal, and water wedged off 0 2 10 72 1 8
Strong white post, with a parting at bottom and water 1 4 6 74 0 2
Strong white post, spongy, and partings with water 4 5 11 79 0 1
Grey and white post and water, wedged off and piped up to the third standing sett cistern 3 1 3 82 1 4
Grey metal stone 0 4 6 82 5 10
COAL 1 1 5 84 1 3
COAL 0 4
Grey metal 1 0
COAL 1 3
Band 0 5
COAL 3 2
Band 0 4
COAL, mixed with black metal 0 11
Thill 0 1 8 84 2 11
Grey metal stone, with large balls of ironstone 1 2 4 85 5 3
Strong grey metal stone, with girdles 3 3 9 89 3 0
Black metal, with scares of coal 0 0 9 89 3 9
COAL 0 3 10 90 1 7
COAL 1 2
Black grey metal, with scares of coasl 2 8
Grey metal stone, with balls of ironstone 0 2 6 90 4 1
Strong grey metal stone, with strong dunnish post girdles 3 1 10 93 5 11
Grey metal 1 0 8 95 0 7
COAL - Five-Quarter Seam 1 0 10 96 1 5
COAL 1 7
Black metal, with scares of coal 0 6
Dark grey metal 4 4
COAL 0 5
Grey metal stone, with post girdles 5 4 6 101 5 11
Grey post 0 4 10 102 4 9
Blue and grey metal stone 3 5 9 106 4 6
Blue and grey metal stone, with strong girdles 1 5 3 108 3 9
COAL - Main Coal Seam 1 0 6 109 4 3
COAL, top 1 8
Band 0 1
COAL 4 9
Depth of the sump 4 3 0 114 1 3