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No. 246 — BlenkinsoppTownship of Blenkinsopp, Northumberland Sheet 91 of 19thC Ordnance Map. Lat. 54° 58' 24", Long. 2° 31' 13". [ OS Grid Ref: NY 66700 64433 (366700,564433) ] Section of Strata sunk through in the Quarry Pit, Blenkinsopp Colliery, 1836 Approximate surface level 420 feet above sea (Ordnance datum)
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