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| situated on the western and southern flanks of Plynlimon, consists of three interconnected power stations...of the Upper Afon Rheidol. One mile north of Ponterwyd, a reservoir has been constructed at the head...The tunnel is sited on the western limb of the Plynlimon anticline; it has been driven through a sedimentary...They consist essentially of angular and subangular quartz (up to 70 per cent of the rock) with smaller and...in the area immediately to the south-east of Ponterwyd. Here he demonstrated coincidence of graptolite |
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| technical history and exploration with reference to mine workings in the British Isles are welcomed for inclusion...:. R.G. GUTHRIE PUBLICATION AFTERSALES NORTHERN MINE RESEARCH 186 STATION ROAD BILLINGHAM CO.CLEVELAND...CLEVELAND TS232RT Tel: 0642 554437 © NORTHERN MINE RESEARCH SOCIETY SOCIETY This volume is copyright...Sheffield S2 5HH, for the Publishers, The Northern Mine Research Society, Sheffield,· England. ISSN: ISBN:...OF THE C.Eng., NORTHERN SOCIETY. 1979. FGS., MINE FIMM. RESEARCH 6 I ' AUTHORS =====-- NOTE |
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| thanks to the Council of the University College of Wales, Aberystwyth, for having released me as far as possible...Estate, I am indebted for perrnission to use the mine records and plans in the Estate Office; to 1\Ir...IX.-Longitudinal Section of Loveden Mine • • X.,, ,, Brynyrafr Mine XI.,, ,, East Daren · • XII.. ,, ,...Dyfngwm districts X:Xll.,, ,, district near Van Mine• XXTII.-Plan of Van fiat.s • XXIV.-Chart showing...his two groups, the Aberystwyth group and the Plynlimon group, which he regarded as being below the base |
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| rich crystalline mass 3x4 Broken Hill, New South Wales Australia £8 4 VANADINITE orange brown crystals...all over 4x4 surface. It's about lm thick Cassagna Mine, Ne ,Graveglia Valley, Liguria Italy, I collected...botryoidal 1cm x 8mm on 2.5xlcm Penberthy Croft Mine St Hilary Cornwall £6 - the type location 19 URBANITE...PURPURITE-HETEROSITE rich mass of mauve cleavages with some small quartz veins. Has been acid dipped to show up the colour...Scotland £10 27 SUGILITE mauve chip about 8mm Wessels mine, North Cape Province South Africa £8 31 CLINTONITE |
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| caledonite crystals up to 4.5 mm tall from Red Gill Mine, Caldbeck Fells, Cumbria. Norman Thomson Collection...mm from the dump of Endeavour Level, Potts Gill Mine, Caldbeck Fells, Cumbria. Paul Nicholson Collection...Tindle 3-9 Zincolivenite from the Penberthy Croft Mine, Cornwall Jens C. Ø. Andersen and David Moulding...associated with the Camdwr Fault in the Central Wales Orefield Tom Cotterell 15-25 NOTE The composition...collected by Sir Kingsley Dunham from ‘Nentsbury Mine’, Nenthead, Cumbria Trevor F. Bridges 61-64 NOTE |
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| 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 |
 | Shand, Paul, Darbyshire, D.P. Fiona, Gooddy, Daren, H. Haria, Atul (2007) 87Sr/86Sr as an indicator of flowpaths and weathering rates in the Plynlimon experimental catchments, Wales, U.K. Chemical Geology, 236 (3) 247-265 doi:10.1016/j.chemgeo.2006.09.012 | Journal (article/letter/editorial) |
| flowpaths and weathering rates in the Plynlimon experimental catchments, Wales, U.K. Paul Shand a,⁎, D.P. Fiona...Crowmarsh Gifford, Wallingford, Oxfordshire, OX10 8BB, UK NERC Isotope Geosciences Laboratory, British Geological...Geological Survey, Keyworth, Nottinghamshire, NG12 5GG, UK c Centre for Ecology and Hydrology, Crowmarsh Gifford...Gifford, Wallingford, Oxfordshire, OX10 8BB, UK Received 11 April 2006; received in revised form 19 September...and Afon Hore) of the River Severn at Plynlimon in Central Wales. The dominant source of Sr in the catchments |
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| Central Wales Orefield (Fig. I) is a loosely defined area occupying the county of Ceredigion (the northern...:irl O t-.,�·'.• • ,, ·. Cambrian Mountains of Wales. At v�ri,-,,., . , , . r ,·:·i :· · cipally from...faults that cut mainly Ordovician sediments carry quartz-calcitc-barite veins dominated by Pb and Zn with...Lower Palaeozoic times the area that is now central Wales lay cowards the middle of a structurally conuolled...Ashgill-Upper Llandovery strata ..:xposed in the Central Wales Orefield. A range of basinal facies is present, |
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| H~RTFELL-VALENTIAN SUCCESSION i l~ the DISTRICT around PLYNLIMON and PONT ERWYD ('NORTH CKRDIGA.NSHIRE), By OWEN...extends for a distance of about 9 miles, from the Plynlimon Mountains near the noithern margin, to the Ystwyth...plateau' which is characteristic of so much of Central Wales; south of the Aberystwyth road it reaches a nearly...the road it rises gradually to 2468 feet on Pen Plynlimon F a w r - - t h e culminating point of the ]flateau... The general features of the region of Central Wales were ably described by Dr. Herbert Lapworth (6) |
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| the Area. Mines - History Mineralization - General Mine Index (Map References) Mineral Index Minerals of...37 38 39 39 40 PLATES Nantiago Mine Pwllrhenaid Shaft .. Penrhiw Mine Dylife Esgairhir Castell Henfwlch...Cwmystwyth Blaenceulan Pyrite on Calcite (Nantiago Mine) .. ■ .. 11 14 14 17 17 18 19 20-21 22 24 MAPS...Acknowledgements are due to members of The Russell Society (a mine�alogical society based in Leicester) who contributed...dating from the early nineteenth century - the old mine heaps still remaining providing the basis for collecting |
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| Basin (UK) D AV I D M . D. JA M E S ∗ School of Earth and Ocean Sciences, Cardiff University, Wales, UK...2013) Abstract – The Hirnantian stratigraphy of Wales is critically assessed against the global evidence...correlation of the basinal succession in Central Wales with the shelf sequences along the Tywi Lineament...first appearance of Normalograptus persculptus in Wales does not correspond with the base of the persculptus...Bala Lineament, the Variscan Front and the Central Wales Inliers. Keywords: Hirnantian, Welsh Basin, glacio-eustacy |
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| the auriferous lodes of Ogofau in south-central Wales. Post-tectonic veins are the most widespread type...exemplified mainly by those of the Harlech and Plynlimon Domes. These late veins are attributed largely...Woodcock (1984a, b) and the offshore environments in W Wales are discussed by Cave & Hains (in press). The magmatic...burial (Bevins & Rowbotham 1983) and in parts of N Wales FIG. 1. Outcrop of the Welsh Lower Palaeozoic Basin...Ordovician volcanic centre in Snowdonia in North Wales, contains metalliferous as well as barren veins |
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| of the Llanrwst and Llanfair veinfields, North Wales: evidence from fluid inclusions and stable isotopes...Sciences, The University of Leeds, Leeds LS2 9JT, UK (Received 2 July 1995; revised version received...Shropshire in England and Llanrwst, Plynlimon and the Dolgellau Gold Belt in Wales. These deposits are hosted...pyrite ± marcasite and associated carbonates + quartz ± baryte. The radiometric ages of these deposits...Sciences, University of Bradford, Bradford BD7 1DP, UK (140–200 °C) fluids, with sulphur supplied from |
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| Books on Wales by the same author SNOWDONIA THROUGH THE LENS SNOWDON HOLIDAY WANDERINGS IN WALES ESCAPE... Llanberis, Beddgelert, The Snowdon Ranger Mid-Wales Dolgellau, Tal-y-llyn, Dinas Mawddwy, Bala, Harlech...Harlech, Llanbedr, Barmouth, The Devil’s Bridge South Wales Abergavenny, Crickhowell, Talgarth, Hay, Brecon...photographs The Arans | Route and 5 photographs Plynlimon | Route and 2 variations and 4 photographs The...346 Introductory notes The coastal resorts of Wales have been a treasured venue for the holidaymaker |
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| FEATURES. be visited includes a portion of Central Wales bordered by the coast from Towyn to the south of...striking contrast to that of the plateau. The Plynlimon mass (2,468 ft.) and a part of the hills cast...Subsequen tly a genera l uplift of th e whole of Wales caused renewed excavation in those rivers which... M. acinaces, M. cypbus and M. triangulatus. PLYNLIMON AREA - - - .'.... _~-- NORTHERN AREA BALA...junction with the slates are ofte n veined with quartz and may contain a certain amount of galena. These |
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| DROSGOL FORMATION (ASHGILL), WEST CENTRAL D.M.D. WALES JAMES Shell Internatmnale Petroleum Maatschappij...given to the pebbly mudstones suggest slope-base Wales. Sediment. of mass-flow and map references suggests...Central setting et al., 1976). uplift Ordovician Wales (Fig. 1). This paper documents the sedimentology...around the Plynlimon “Groups” 22 Fig. I. Location map for the Ashgill inliers of Mid-Wales. Bryn-glas...siltstones (“flags”). of these strata in the Central Wales inliers has been discussed by Jones and Pugh (1935) |
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| presented and discussed. The samples were collected from mine dumps and museums (not in situ) and are mainly from...sulphide minerals and are associated with calcite, quartz, baryte, and witherite. In the mines such as Tankerville...the veins, giving way to sphalerite, calcite, and quartz at depth (Dines 1959). Where concentrated, chalcopyrite...broadly divided into the following stages: (1) quartz with minor pyrite; 103 THE WEST SHROPSHIRE OREFIELD...colour-banded sphalerite with calcite and quartz; (4) galena, calcite, and quartz; (5) light brown sphalerite; (6) |
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| Geological Excursions in Dyfed, South-West Wales National Museum of Wales —~— = iY a_a>. a gan Op ot, _— a...Dyfed, South-West Wales boil | o \‘ Mf Nin. tin diMneens pis Np gece é South Wales Gros bye |Published...the Geologists’ Association, |National Museum of Wales \Cardiff May 1982 © ISBN 0720002494 REFERENCES...excursions in Dyfed, south-west Wales. 327 pp., National Museum of Wales, Cardiff. BOWEN, D. Q. 1982. Pleistocene...excursions in Dyfed, south-west Wales. 327 pp., National Museum of Wales, Cardiff. Printed by Graphic |
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| UK .M ----- JOURNAL I OF N E & ----- s M 1· N E R A L S n \) II I/ i] NUMBER 15 • SPRING...TISPIECE CALCITE on HEMATITE Fred Bull 4 MI The UK Jouma/ of Mines and .Minerals publishes articles...N'(Olbl L'K Journal of Mines & Minerals No. 15 -2- UK Journal of Mines & 1'.lincrals No. 15 -J- .......rescue dig on the spoil heap of the Alva silver mine near Stirling. Remarkable specimens of dendritic...has taken place over many years concerning early mine working. Was the area worked for its copper either |
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| South Wales -te- f '■ ■ \ s -■ afe^Kgggft « ■ 'fe-:. ■ -- ■ • .: ■■■ ■■.'-■ - ■* ■<■...GEOLOGICAL SCIENCES British Regional Geology South Wales (THIRD EDITION) By T. Neville George, D.Sc., F...publication of the second edition of the ‘South Wales’ handbook in 1948 much progress has been made in...stone and Upper Devonian; Skrinkle Sandstones; Quartz Conglomerates, Plateau Beds, and Grey Grits . 7...Coalfield; Contemporary Earth-movements; Coals of South Wales ......... 10. Palaeozoic Earth-movements: Caledonian |
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| REGIONAL GEOLOGY SOUTH WALES 0SECOND EDITION) by J. PRINGLE, D.Sc. (Wales) and T. NEVILLE GEORGE...REGIONAL GEOLOGY SOUTH WALES (SECOND EDITION) J By J. PRINGLE, D.Sc.(Wales) and T. NEVILLE GEORGE...Cosheston Beds; Skrinkle Sandstones; Brownstones; Quartz Conglomerates and Grey Grits .. .. .... .. .. ...APPENDIX: Maps and Publications dealing with South Wales 99 iv ILLUSTRATIONS FIGURES IN TEXT FIG. 1....succession in South Wales .. .. .. .. .. 3. Structural map of South Wales .. .. .. .. .. |
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| him immense personal satisfaction. A crystal of quartz collected by Trevor in 1959, in the Austrian Alps...Museum of Natural History, the National Museum of Wales, the Hancock Museum (Newcastle Upon Tyne) and the...Roy Starkey 4 Lot 324 – Fluorite on quartz – Cambokeels Mine, Eastgate, Weardale. Lot 222 – Fluorite...Fluorite, chalcopyrite and siderite – Boltsburn Mine, Rookhope, Co. Durham. Collected in 1897. 5 Lot No...green stock label. SW.17 Paratacamite - Botallack Mine, St.Just, Cornwall. [SW 365 330]. From Hazard Section |
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| SOCIETY was fonned in 1960 as the Nonhern Cavern ond Mine Research ocicty, its acuvitics centred upon the...93 Published in September 2012 by THE NORTHERN MINE RESEARCH SOCIETY 1 elson. Lancashire The Society...Goodchild 38 The ar enic industry at Botallack Mine, Cornwall and its archaeology: a story or early... trials and lodes of the Glandyfi Tract, Ceredigion, Wales David M.D. Jame Further notes on North Pennine...surveyor was underground during 1871 to keep the mine plans up to date. The Rev. Auden continued to work |
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| Structure and deformation history of the Central Wales Synclinorium, northeast Dyfed: evidence for a long-I...Downing Street, Cambridge CB2 3EQ, U.K. The Central Wales Synclinorium in northeast Dyfed is markedly asymmetrical...anomalous in the context of fold-dominated mid-Wales and appears to be associated with a long-lived basement...topography in early Silurian time. KEY WORDS Central Wales Synclinorium Lower Silurian Strike-slip Basement...Basement control 1. Introduction The Central Wales Synclinorium (CWS) (Jones 1912; Shackleton 1954) is a |
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| 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 |
