Derwent Crook Colliery

Thomas Pit

Section of Strata sunk through in Thomas Pit, Derwent Crook Colliery

Shaft Details

Approximate surface level 92 feet above sea (Ordnance datum)

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Geology encountered	Thickness		Depth
	ft.	in.	ft.	in.
Walling	78	0	78	0
Blue metal	14	0	92	0
Blue metal	3	0	95	0
Post	12	0	107	0
Blue metal	3	0	110	0
COAL - Five-Quarter Seam	9	6	119	6
Blue metal	1	3	120	9
Post	19	0	139	9
Blue metal	4	0	143	9
COAL - Hutton Seam	5	0	148	9
COAL, good	4	2
Splint	0	10
Blue metal	33	0	181	9
Post	39	0	220	9
COAL	1	3	222	0
Blue metal	36	6	258	6
Post	54	1	312	7
Blue stone	1	8	314	3
Post	9	0	323	3
Blue stone	4	0	327	3
COAL - Harvey Seam	4	5	331	8
COAL	1	8
Band	1	6
COAL	1	3

Source: An Account of the strata of Northumberland & Durham as proved by Borings & Sinkings, Volume C-E, published by the North of England Institute of Mining & Mechanical Engineers, 1881

original entry for sinking/boring number 0718 in "An Account of the strata of Northumberland & Durham as proved by Borings & Sinkings, Volume C-E, published by the North of England Institute of Mining & Mechanical Engineers, 1881"

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