	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)
	United Kingdom mineral output. Plate 1 Purple fluorite crystals from a cavity in the Great Limestone...FELL TYNEHEAD CRAG GREEN RAMPGILL UNDERGROUND SHAFT LONGCLEUGH BOREHOLE ALLENHEADS No1 BOREHOLE JOHNSON...was the lowest bed reached by No. 1 underground shaft at Rotherhc>pe Fell Mine, near Alston [700 427 ]...rn). In W eardale, Burtree Pasture Underground Shaft [8603 4180] did not fully penetrate the bed. At...thickness is not rnaintained to the N at Slitt Shaft [9058 3920 ], where only 34 ft (10.3 rn) was recorded
	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)
	was: the lowest bed reached by No. 1 underground shaft at Rotherhope Fell mine, near Alston. Tl1e overlying...ft. In vVeardale, Burtree · Pasture t1nderground shaft did not fully penetrate the bed. At Greenlaws Mine...·�� -:-..:· ,� .�- .. 3 TYNEHEAO RAMPClLL U.C. SHAFT 4 CAASSHILL C OWCREEN 5 BURTREE' PASTURE 6...exposures in Middle hope and section of Slitt Shaft by J. C. Cain ; Section 9, Weardale Lead Co.'s section...Rampgill U .G. Shaft • • • Burtree Pasture U.G. Shaft Sedling 1\-Iine East ••• Old Fall Shaft • • • ••• Greenlaws
	*Neukirchen, Florian, Ries, Gunnar (2020) The World of Mineral Deposits. Springer International Publishing. doi:10.1007/978-3-030-34346-0*	Book
	123 Florian Neukirchen Berlin, Germany Gunnar Ries Marxen, Germany ISBN 978-3-030-34345-3 ISBN 978-3-030-34346-0...questions, or otherwise supported us. Berlin, Germany Marxen, Germany June 2019 Florian Neukirchen Gunnar Ries...Diatomite (Diatomaceous Earth) . . . . . . . . 7.14 Fluorite and Baryte . . . . . . . . . . . . . . . . . 7...works at CRB Analyse Service GmbH in Hardegsen (Germany) and in his spare time blogs about geoscientiﬁc...Friedrich-Christian Mine in Wildschapbach, Black Forest (Germany) (photo © F. Neukirchen, Markl Collection/Tübingen)
	*Smith, R. C. II (1977) Zinc and lead occurrences in Pennsylvania. Mineral Resource Report* M72. Pennsylvania Geological Survey**	Report (issue)
	Brookmeyer (Blue Ball quarry), George Buchannon (Whim shaft of "new" Perkiomen mine), Betty and John Clauser...Wheatley-Brookdale-Phoenix vein (Phoenixville) 229 '6 235 236 246 263 Columbia County Almedia Mine area ...Hollow mine (Phoenixville), Chester County 226 229 235 42. Montgomery County Mine (Phoenixville), Chester...foundation 57. Photograph of view of S. Snyder shaft area and 148 148 discoloration of crops, Woodbury...Ecton mine 104. Photograph of old stack near engine shaft of Brookdale mine, Phoenixville district 105. Schematic
	*(1926) Ore Deposits of the Jerome and Bradshaw Mountains Quadrangles, Arizona. Bulletin* Vol. 782. US Geological Survey doi:10.3133/b782**	Report (volume)
	j'ust'east of the Verde fault, as shown in the Edith shaft of the United Verde Extension mine, it is thrown...Prescott. Another dike observed near the Tiptop shaft, in the Tiptop district, is a dullrwhite rock with...tetrahedrite, galena, and sphalerite. Fluoiite. Fluorite is rare. A purple variety occurs in small quantities...and barite is often found in the silver veins. Fluorite is found in three places, albite in one, adularia...vicinity to a coarse albite aggregate, with some fluorite, exactly as at Copper Basin. The gold-bearing
	*Spencer, A.C. (1917) The geology and ore deposits of Ely, Nevada. Professional Paper* 96. US Geological Survey doi:10.3133/pp96**	Report (issue)
	................... ·................ . Taylor shaft ..................................................basin ofWhiteRiverand Ward Mountain from Veteran shaft . . . . . . . . . . . . . . . . . . . . . . . ....section through Veteran workings and Boston-Ely shaft; plan and cross sections of Veteran ore body .....about half a mile west by southwest from the Giroux shaft. Here the detrital capping may be 10 or 15 feet...isolated hill which lies just west of the Golden Gate shaft of the McDonald-Ely Co. It is notewor'thy that the
	*(1919) Mines and Mineral Resources of portions of California. Report XV of the State Mineralogist* 15. California State Mining Bureau**	Report (issue)
	II, Lassen County. 226 227 227 228 228 229 229 235 236 Description Railroad Facilities Mining Conditions...Eagle Mine and ketch map of Hayden Mill- 231 235 Hill_ Modoc County. )utcrop of discovery vein on...Mine Camp of Goldstone Goldstone Mining M.i in shaft of the Company Open rut work at original strike...metamorphosed sediments Mill and head-frame at shaft of the Ozark Mine Mine dumps and compressor plant...Custom mill at Goffs, built district Eureka shaft 848 -of the Boose, Michael and Buchanan Company
	Lindgren, Waldemar, Loughlin, G.F., Heikes, V.C. (1919) Geology and ore deposits of the Tintic mining district, Utah, with a historical review. Professional Paper 107. US Geological Survey doi:10.3133/pp107	Report (issue)
	. . . . . 267 Ore bodies....................... 235 Ore bodies. . . . . . . . . . . . . . . . . . . 269.... . . . . . . . . . . . 275 Geology near No: 3 shaft......... 239. PrOspects west of Pinyon Peak. . 275...Blossom No. 1 Lehi-Tintic................. 276 shaft.......................... 241 Selma...............Index ........... ~............................... shaft .................... : . . . . . 277 . ... ~·...Tintic Valley, from low spur south of He~kimer shaft; J3, Contact of quartz porphyry and monzonite ·
	*(1915) The Salt Lake Mining Review* Vol. 17. Will C. Higgins and A. B. Greeson**	Journal (volume)
	West and South Temple CENTURY BLDG ., 231 - 233 - 235 EDISON ST. SALT LAKE CITY , UTAH THE SALT LAKE...raise connecting the three compartment vertical shaft with the adit tunnel level , under way for several...and that the property will be reopened soon . The shaft was down 700 feet when sinking was resumed in February...started a crew of men to work sinking a 200 -foot shaft from the surface close to the portal of the lower...about thirty inches of good milling ore. The ore shaft, and work is to be carried on contin with a small

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Fluorite from Shaft 235, Antonsthal, Breitenbrunn, Erzgebirgskreis, Saxony, Germany

Fluorite from
Shaft 235, Antonsthal, Breitenbrunn, Erzgebirgskreis, Saxony, Germany