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| An Account of the Strata of Northumberland and Durham | Volume: F-K, Page: 198 |
No. 1,116 — Heddon
Township of Heddon-on-the-Wall, Northumberland
Sheet of 19thC Ordnance Map. Lat. , Long. .
Account of Strata sunk through in the Margaret Pit, Heddon Colliery
Approximate surface level feet above sea (Ordnance datum)
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| 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 |
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