Seaton Burn Colliery

Mason Pit

Strata sunk through in the Mason Pit, Seaton Burn Colliery, Mason Estate, in the South-west corner of the Second Field North of Gardner's Houses Farm. April, 1888

Shaft Details

Sunk: Apr 1888, Closed: 17 Aug 1965

Approximate surface level 212 feet above sea (Ordnance datum)

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

Geology encountered	Thickness		Depth
	ft.	in.	ft.	in.
Brown clay, with boulder stones	7	0	7	0
Yellow freestone, mixed with light grey post	5	0	12	0
Dark blue metal	2	7	14	7
Post girdle	0	3	14	10
Light blue metal	1	5	16	3
Post girdle	0	5	16	8
Light blue metal	2	3	18	11
Shell bed	1	7	20	6
Ironstone girdle	0	3	20	9
Light blue metal	0	4	21	1
Black stone band	0	2	21	3
COAL - Low Main Seam	3	10	25	1
COAL	0	2¼
COAL, grey	0	3
COAL	2	9
Brat (danty band)	0	2
COAL	0	6

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 1686 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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