 | | Report (issue) | | technical hi.story and exploration with reference to mine workings in the British Isles are welcomed for inclusion...MRS. H. BIRD PUBLICATION AFTERSALES NORTHERN MINE RESEARCH 41 WINDSOR WALK SOUTH ANSTON SHEFFIELD...SHEFFIELD S31 7EL Tel. No. DINNINGTON © NORTHERN MINE SOCIETY 3229 RESEARCH SOCIETY This volume is copyright...Sheffield S2 5HH, for the Publishers, The Northern Mine Research Society, Sheffield, England. : ISSN...MONOGRAPH DOWN. OF WALES. B.Sc., THE RESEARCH 1980. Ph.D. NORTHERN SOCIETY, MINE O 0308--2199 901450 |  | | Report (issue) | | •' Llanbedr -f= 200 � � Aton Garr, 100 Dyffryn � Ardudwv O.t- � 0 I 1 I SCALE 2 3 I ··...Geological notes on popular walks 50 9 Barmouth to Hafotty mines 50 10 Panorama Walk 53 11 Roman Steps (Bwlch...48 26 Geology of the footpath from Barmouth to Hafotty manganese mines (No. 9) 5 1 27 Panorama Walk, geology...Association. Special care should be taken at old mine workings some of which may be in a dangerous condition...Formation (230-360m ) Barmou.th Formation (60-230m) Hafotty Formation ( 170.300m I :I: )> (:;; :;::JJ n |  | | Journal (volume) | | obtained from Llyn Du Bach Mine, Harlech, Merionethshire, Wales. National Museum of Wales Specimen No. NMW 2013...Cambrian manganese ore bed, Harlech, Merionethshire, Wales Tom F. Cotterell 39-51 Franklinphilite in veinlets...Cambrian manganese ore bed, Harlech, Merionethshire, Wales Tom F. Cotterell and Neil Hubbard 51-59 Chernovite-(Y)...blobs’ in Leicestershire, the focus shifts to North Wales with articles on the complex and intriguing mineralogy...earth element bearing mineral chernovite-(Y) in Wales. Volume 16 concludes with an excursion to the Lewisian |  | | Journal (article/letter/editorial) | | the Cambrian manganese deposits, Harlech, North Wales M. A. Bennett Department of Earth Sciences, University...the Harlech area, North Wales. It is most intense at the base of the Hafotty Formation where it forms...deposit is a discrete bed near to the base of the Hafotty Formation, largely composed of Mn-Ca-Mg-Fe carbonates...MUDSTONE BARMOUTH FM LWR. CAEREO CILAN GRITS HAFOTTY FM MULFRAN BEDS HELL'S MOUTH GRITS LLANBEOR F...spilitici keratophyric terrain. Precipitation of rhodochrosite (MnC03) and silica as a colloidal gel was supposedly |  | | Book | | A Mineralogy of Wales RfCHARD E. BEYfNS Ocpartmellf o[Geolngy, Nmin11a/Museum of\Valcs, Cardiff AMGUEDDFA...Colliery, Ponh, Mid Glamorgan. National Museum of Wales specimen 48.264.GR 175. ex Cymmer Welfare Library...CE 6 I CES IN WALES 9 30 127 138 6 INTRODUCTION The mineralogy of Wales is diverse. with over...reveal the presence of additional species new to Wales. and perhaps new to the British Isles. It is also...completely new to cience will be discovered in Wales. as techniques for analysing specimens become ever |  | | Report (edition) | | visited the workings for manganese ore in North Wales, and their .notes have been made use of by J\fr...Survey officers in examining both the mines and the mine plans. Special mention show.d be made of Mr. Josiah...assistance m connection with the mines of North Wales: JOHN Geological Survey Office, 28, Jennyn Street...spitzluten; t hese machines are frequently made at t he mine to suit t he local peculiarit ies of t he ore. The...The cost of working per ton of ore- at Tin.croft Mine varied from 18s. 6d. in 1900 t o 28s. 6d. in 1914 |  | | Journal (volume) | | veinlets in the Cambrian manganese ore bed, Harlech, Wales Tom F. Cotterell, John S. Mason and Allan C. Dean...Trevor F. Bridges 61-65 A report on Westernhope Old Mine, Weardale, Co. Durham Trevor F. Bridges Journal...from around 40 to over 110, including the ‘first UK occurrences’ of a number of minerals, such as fornacite...Långban in Sweden, the Kombat Mine in Namibia, and the Mammoth St. Anthony Mine in Tiger, Arizona. • Production...Manchester University Museum; the National Museum, Wales; Stockholm Museum. 2 Cambridge, Loughborough, Manchester |  | | Journal (article/letter/editorial) | | —THE GEOLOGY OF THE DOLGELLEY GOLD-BELT, NOBTH WALES. By ARTHUR R. ANDREW, M . S C , F.G.S. 1. 2. 'A...greywackes with pebble bands ; say 600 feet thick. 3. Hafotty or Manganese Shale Group (with the well-known persistent...(Forbes), Ankerite (Forbes), Chalybite (Forbes), Rhodochrosite, Cerussite, Malachite. Silicates: Orthoclase...Further up the Mawddach, close to the Tyddyn-Gwladys mine, they cut across the river and are well exhibited...of the Mawddach River near the Cefn-deuddwr Gold Mine. The very great predominance of these ribs in the |  | | Report (issue) | | a&te-product has often become the most valuable asset of a mine under changed conditions as· rega_rds demand. Tin-mines...the·aescription· o1 the-ma.iiganese--workings in North Wales, the chief wolfram•mines i n Illogan· .and the genera...2.-0re-dressing plant of the Gunnislake Clitters Mine ... PAGB 2 26 , CHAPTER I. TUNGSTEN OltES--IN'l'RODUCTION...granite of th& collected in £our years from one mine. • Thorpe, 'Dictionary of Applied Chemistry,' vol...Scheelite was found in the abando ned Devon Friendship Mine. The other mine1·als associated with wolfram are |  | | Book | | provided by: Amgueddfa Cymru (National Museum of Wales, Cardiff); British Geological Survey, Edinburgh...meneghinile Pengenna mine,St Kew,Cornwall; Shallowfield Bridge,SouthMolton,Devon Tynebottom mine,Alston.CUm~ria...CUm~ria mercury Chatsworth mine,Grassinglon, Yorkshire Severallocalities in theLakeDistrictandComw melacinnabar...theLakeDistrictan:iCorrr::a!I natrojarosite Wanlhwaite mine,StJohn'sin theVale,Cumbria SouthTerrasmine,StStephen-in-Brannel...Cumbria pharmaco!ite Wanlhwaite mine,StJohn'sin theVale,Cumbria Chatsworth mine,Grassington, Yorkshire p:cropharmacolne |  | | Journal (article/letter/editorial) | | (spessartite) and manganese carbonate (dialogite or rhodochrosite) in roughly equal proportions, with occasional...was further pointed out that spessartite and rhodochrosite occur in varying amounts in the associated grits...the hillside marked by the workings of the old Hafotty Mines. Some of the nearer workings were examined..... The Iron-ore Oolites and Pisolites of North Wales," Quart. Journ, Geol. Soc., vol. Ixxxix (1933),...quarries," there being no such thing as a slate "mine." The party returned to the entrance and ascended |  | | Report (issue) | | manganese deposits of Rhiw, western Llyn, North Wales M J Brown and A D Evans \ BRITISH GEOLOGICAL...manganese deposits of Rhiw, western Llyn, North Wales Geochemistry M J Brown, BSc Geophysics A D Evans...site/galena vein from the Gwynfynydd Gold Mine, near Dolgellau in North Wales This report was prepared for the...manganese deposits of Rhiw, western Llyn, North Wales. British Geological Survey Technical Repon WF/89/14...Llyn, North Wales. These surveys covered ground south-west from the old Benallt manganese mine as far as |  | | Book (volume) | | classical section through the Cambrian in South Wales. In the background is the type section of the Caerbwdy... . . . . . . . . .15 The Cambrian of Wales and England by A. W. A. Rushton ............ 43...1961). The Cambrian System, whose type area is Wales, was named by Sedgwick (in Sedgwick and Murchison... ruggedest and most complicated tract of North Wales.’ Woodward’s (1908, p. 93) account is delicately...giant strength on a barren primary district in Wales, which was he owns like “rubbing himself against |  | | Report (issue) | | waste-product has often become the most valuable asset of a mine under changed conditions as regards de,mand. Tin-mines...Manganese. Distribution of the Ores. Output, in North Wales from 1892 to 1913. Output and value in the United...2.-0re-dressing plant of the Gunnislake Glitters Mine 26 A2 ,\. , ... I 'l CHA.P�L'ER I. TUNGSTEN...o:f wol�ram were collected 1n four years fro1n one mine. The granite of the * Thorpe, ' Dictionary of Applied...(District 3). The most prolific of these is Bedford Mine which has yielded on an average some three tons |  | | Report (issue) | | AROLWG DAEAREGOL PRYDAIN Regional geochemistry of Wales and part of west-central England: stream water ...GEOLOGICAL SURVEY. 1999. Regional geochemistry of Wales and part of west-central England: stream water....255 9) North-west England and North Wales 1997 (0 85272 307 5) Wales: stream water 1999 (0 85272 363 6)...0115-936 3200 e-mail: sales@bgs.ac.uk www.bgs.ac. uk Murchison House, West Mains Road, Edinburgh EH93LA...Stapledon Building, University of Wales, Penglais, Aberystwyth, Ceredigion, Wales SY23 3DB ,:r 01970-622541 Fax |  | | Report (issue) | | Craig Llannerch-y-cawr, Claerwen valley, Powys, mid Wales. BOS Photo MN323 l l. © NERC I 999 Keyworth, Nottingham...Basement (Precambrian) rocks North-west Wales South-west Wales \Velsh borderland Cainbrian basin and shelf...Tudwal 's Peninsula Northern Snowdonia South-west Wales \Velsh borderland Ordovician basin and shelf deposits...South-west Wales Central \Vales and the Welsh borderland Silurian basin and shelf deposits North Wales Mid-Wales...Mid-Wales South Wales and tJ1e Welsh borderland Post-Caledonian cover Devonian Carboniferous Pennian, Triassic |  | | Report (edition) | | SURVEY AND MUSEUM BRITISH REGIONAL GEOLOGY NORTH WALES by BERNARD SMITH, M.A., Sc.D., F.R.S. and T. NEVILLE...North Wales . 75 78 IV ILLUSTRATIONS FIGURES IN TEXT PAGE The rock succession in North Wales Geological...lateral variations in the Cambrian rocKs ot .North Wales Map and section of the Cambrian rocks in the neighbourhood...Outline map illustrating Ordovician overstep in North Wales 12 Ordovician fossils. 13. C°dris ran^l SeCti°nS...showing lateral changes in the Bala Series of North Wales 16. MSnowKa8 the distribution of members of the | | | Report (edition) | | British Regional Geology TOM c o s t e s North Wales THIRD EDITION By Bernard Smith, MA, ScD, FRS, and...North Wales 89 iv ILLUSTRATIONS FIGURES IN TEXT FIG. 1PAGE The rock succession in North Wales Geological...of Pre-Cambrian rocks on the mainland of North Wales 5. Cambrian fossils 6. Geological map of the Harlech...lateral variations in the Cambrian rocks of North Wales 8. Map and section of the Cambrian rocks in the...Outline map illustrating Ordovician overstep in North Wales 12. Ordovician fossils .. 13. Comparative sections | | | Report (edition) | | Research Council British Regional Geology North Wales THIRD EDITION By Bernard Smith, MA, ScD, FRS, and...important publications relating to the geology of North Wales .. .. .. .. .. .. . . 89 lV ILLUSTRATIONS FIGURES...PAGE .. .. .. .. .. The rock succession in North Wales .. Geological map of Anglesey .. .. .. .. .. .....rocks on the mainland .. .. .. .. .. .. .. of North Wales .. • • • • 5. Cambrian fossils • • • • • • • • •...variations in the Cambrian .. .. .. rocks of North Wales . . .. .. .. .. 8. Map and section of the Cambrian |  | | Book | | ee eee, ee ekGe eve eee < cs hss). cotinine WALES? . RLRE hc uae ce 2).0) pepiersa tet Sees, tte...Pee ee ne er ee a ee 8. THE CALEDONIDES OF WALES, THE WELSH BORDERLAND AND CENTRAL LD Rey cece SeeM...and Silurian formations of the Lake District and Wales are unaffected by any metamorphism; they contain...can be seen on the one hand in Scandinavia and Wales and on the other in Greenland, though the phenomenon...or Subvariscan foredeep. This runs from South Wales to the Ruhr via the XVIII COUNTRIES Franco-Belgian | | | Book | | 338341 341 4. THE PRECAMBRIAN OF ENGLAND AND WALES . . . . . . . . . . . . . . . . . . . . . . . .... . . . . . . . . . . . . 8. THE CALEDONIDES OF WALES, THE WELSH BORDERLAND AND CENTRAL ENGLAND . . .... . . . . . . . . . . . . . . . . . . . . . . . Wales-Welsh borders . . . . . . . . . . . . . . . . ....Precaspic depression. 13. Scotland; 14. Ireland ; 15. Wales. - 23. Thrusts. 38. 39. 40. 41. in Precambrian...and Silurian formations of the Lake District and Wales are unaffected by any metamorphism; they contain |  | | Report (Issue volume) | | Listed MEMOIRS OF THE GEOLOGICAL ENGLAND & WALES. ANGLESEY . IN TWO VOLUMES. VOLUME II. SURVEY...recall, has never yet been identified in North Wales, and may be represented in part by volcanic rocks...sponges, those from the Menevian beds in South Wales, belong to the same group.' Whatever , then , be...upon the base of the Cambrian throughout North Wales. BWLCH -GWYN At Bwlch - gwyn, felsite , the larger...Some recent researches on another part of North Wales, Island . however, are now throwing a flood of light |  | | Report (Issue volume) | | MEMOIRS OF THE GEOLOGICAL SURVEY. ENGbAND & WALES. ANGLESEY IN TWO VOL{JMES. VOLUlvIE II. Plate...recall, has never yet been idc~tified in North Wales, and may be represented in part by volcanic rocks...sponges, those · from the J\IIenevian beds in South Wales, belong to the same group.' "\Vhatever, then, be...me recent· researches on a.nother part of North Wales, however, are now throwing-a .flood of light -µpon...hiatus betwf?en Cambrian and Ordovician in North Wales assumed of necessity 1nuch more serious proportions |  | | Book (volume) | | Department of Geology, University of Hull, Hull, HU6 7RX, UK Dr Z. Bjamba CMEA International Geological Expedition...Notholt 12 Thornhill Road, Ickenham, Uxbridge UB10 8SF, UK Centre de St Jerome, 13.397 Marseille Cedex 13,...detailed work commencing in 1863 on the Cambrian of Wales by Davies (1875) proved that phosphorites do indeed...D.C. (1875). The phosphorite deposits of North Wales. Quarterly Journal of the Geological Society of...Opik, A.A. (1975). Cymbric Vale fauna of New South Wales and Early Cambrian biostratigraphy. Bureau of Mineral |
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