	Dunham, K. C. (1952) Special Reports on the Mineral Resources of Great Britain Vol. 4, Fluorspar (4th ed.) Geological Survey of Great Britain	Report (edition)
	abundance in the lead and zinc veins of Derbyshire and Durham, and in smaller quantities elsewhere. It is commonly...association is· with calc-spar and barytes, though in Durham where much of the country-rock is arenaceous, the...being had to the more costly process of mining. In Durham the veins, which were left intact by the old miners...Carruthers has had charge of the Northumberland, Durham and • Yorkshire sections; Mr. R. W. Pocock has...has revised the account of Derbyshire :fluorite deposits, and Mr. Henry Dewey has furnished notes on Cornwall
	Dunham, K. C. (1990) Geology of the Northern Pennine Orefield - TYNE to STAINMORE, Economic memoir covering the areas of 1:50 000 and one-inch geological sheets 19 and 25, and parts of 13, 24, 26, 31 32 (England and Wales) (2nd ed.) Vol. 1. British Geological Survey, London.	Book (edition)
	Stainmore The northern one-third of the Backbone of England, that ridge of hilly country known since last century... Plate 1 Purple fluorite crystals from a cavity in the Great Limestone flats, Boltsburn Mine. Collected by...sheets 19 and 25, and parts of 13, 24, 26, 31, 32 (England and Wales) LONDON: HMSO 1990 . I\. © C,rown...sheets 19 and 25 and parts of 13, 24, 26, 31, 32 (England and Wales). Author Sir Kingsle_y Dunham, DSc, SD...FRS, FEng, FIMM Charleycroft, QuarryheadsLane) Durham DHJ 3D Y Other publications of the Survey dealing
	Dunham, K. C. (1948) Geology of the Northern Pennine Orefield - TYNE to STAINMORE, Economic memoir covering the areas of 1:50 000 and one-inch geological sheets 19 and 25, and parts of 13, 24, 26, 31 32 (England and Wales) (1st ed.) Vol. 1. British Geological Survey, London.	Book (edition)
	MEMOIRS OF THE GEOLOGICAL SURVEY OF GREAT BRITAIN ENGLAND AND WALF�S GEOLOGY OF THE NORTHERN PENNINE OREFIELD...inserted on the six-inch maps, and all available mine-sections were reduced to the common scale of 200...made by him. The willing co-operation of all the mine-owners and operators and their staffs made possible... B. Laporte & Co., the Owners of Settlingstones Mine Ltd., Holmside ·& South Moor Colliery Co. Ltd.,...Plan of the North Central flats, Rotherhope Fell Mine 82 11. Cross-section of Burtrec Pasture Vein

Fluorite from Harnisha Burn Mine, Stanhope, County Durham, England, UK

Fluorite from
Harnisha Burn Mine, Stanhope, County Durham, England, UK