 | | Book | | a11cl sar1clsto11es i11c]t1ding Prenleg ,111cl Moel Hebog Sa11dstone 111e1nlJers IJ LE\VELYN VOLCA. 'IC...photograph Snovvclon viewed from the south-west at Moel Hebog. Tl1e Snowdor1 district lies close to the centre...this sector of the basin which was sited across Wales during Lower Palaeozoic times. The lovve t Camb1ia11...1 :50 000 Geological Sheet 1 1 9 ( England and Wales) London: The Stationery Office 1 997 . LV ...Regional Geology North Wales 3rd edition, 1 96 1 , reprinted 1 987 So1 1tb Wales 3rd edition, 1 970, reprinted |  | | Book | | BASIN VOLC DOC) MARGINAL SM IN SNO (NORTH-WEST WALES) ONIA .. .. • • Front co11er Tryfan, viewed...marginal basin volcanism in Snowdonia (north-west Wales). (London : HMSO for the British Geological Survey...based on Ordnance Survey mapping. Printed in the UK for HMSO Dd 291125 ClO W91 ... lU CONTENTS ...map of Wales xi Representation of Harker's diagram, NW Wales 1 Disposition of England and Wales, and Scotland...centres in the Welsh Basin 3 Geological map of North Wales and surrounding offshore region 4 Caradoc volcanic |  | Stephenson, D., Bevins, R. E., Millward, D., Highton, A. J., Parsons, I., Stone, P., Wadsworth, W. J. (1999) Chapter 6: Wales and adjacent areas. In Caledonian Igneous Rocks of Great Britain (Geological Conservation Review Series - Geological Conservation Review No. 17. Joint Nature Conservation Committee, Peterborough. p.231-344. | Book (chapter) | | Survey, Edinburgh R.E. Bevins National Museum of Wales, Cardiff D. Mi award British Geological Survey,...British BG5 Geological ,835 Survey Chapter 6 Wales and adjacent areas Introduction INTRODUCTION...Bevins Geological setting In early Ordovician times Wales lay at a latitude of approximately 600 , in the...wide, which was to dominate the palaeogeography of Wales for over 100 million years. During mid-Ordovician...early as Caradoc times in this sector of Iapetus. Wales was a part of this microcontinent (Soper, 1986) |  | | Report (issue) | | Caledonian structures in the Cambrian Slate Belt, Gwynedd, North Wales. B. C. Webb. 1 The Cambrian - Ordovician...Ordovician boundary between Aber and Betws Garmon Gwynedd, North Wales. A. J. Reedman, B. C. Webb, B. E. Leveridge...the Snowden and Crafnant Volcanic groups, North Wales. M. F. Howells, B. E. Leveridge, R. Addison and...Caledonian structures in the Cambrian Slate Belt, Gwynedd, North Wales B. C. Webb The Cambrian has been divided...paper, along with the following two papers from the Wales Geological Survey Unit, results from mapping on |  | THORPE, R. S., LEAT, P. T., MANN, A. C., HOWELLS, M. F., REEDMAN, A. J., CAMPBELL, S. D. G. (1993) Magmatic Evolution of the Ordovician Snowdon Volcanic Centre, North Wales (UK) Journal of Petrology, 34 (4) 711-741 doi:10.1093/petrology/34.4.711 | Journal (article/letter/editorial) | | the Ordovician Snowdon Volcanic Centre, North Wales (UK) by R. S. THORPE 1 *, P. T. LEAT 2 , A. C. MANN...A A, UK 2 Department of Geological Sciences, Science Laboratories, South Road, Durham DH1 3LE, UK 3 Church...4RR, UK 4 British Geological Survey, Bryn Eithyn Hall, Llanfarian, Aberystwyth, Dyfed SY23 4BY, UK (Received...Ordovician Snowdon Volcanic Centre (SVC) of North Wales comprises a bimodal basalt-subalkaline/peralkaline...of cessation of Caledonian subduction in North Wales. Rhyolite magma chambers were short lived and discontinuous; |  | | Journal (article/letter/editorial) | | GEOLOGY OF THE NEFYN-LLANAELHAIARN AREA OF NORTH WALES W. E. TREMLE'IT A detailed geological map of this...Here grey and black silty slates, with frequent pyrite nodules, are succeeded to the SSW. by a black pisolitic...arenaceous equivalents of these beds elsewhere in North Wales, bur they do not appear to exist further southwest...metamorphism in the northeastern and southeastern parts of Moel Ty-gwyn, but this is best developed along the northwestern...this metamorphism is not clear in the examples on Moel Ty-gwyn, since there is no other intrusion exposed |  | | Report (issue) | | Dolwyddelan Syncline Lower Rhyolitic Tuff Formation, Moel Siabod 29 Correlation 30 Genesis 33 References...Lower Rhyolitic Tuff Formation south and east of Moel Siabod 31 Fig. 7 Correlation of Lower Crafnant...crete areas of outcrop, namely the synclines of Moel Siabod and Dolwyddelan. Detailed petrographic examination...discontinus d'affleurements, � savoir Jes synclinaux de Moel Siabod et de Dolwyddelan. En faisant un examen petrographique...Gegenden von Ausbissen, namlich die Synklinen von Moel Siabod und Dolwyddelan. Durch ausfuhrliche petrographische |  | | Journal (article/letter/editorial) | | appreciation of the geology of North and Central Wales, remarked that the "Glenkiln shales" (the Glanrafon...Longvillian. The recognition of ignimbrites in North Wales by Rast et al. (1959) has proved the most striking...thick accumulations of extrusive rhyolites in North Wales the possibility of an intrusive origin for the Lower...extent; the habit of intrusive rhyolites in North Wales is that of plugs, which may be large, and sills...leucoxene, pyrite, ilmenite and, less commonly, apatite and anatase. Alteration of the pyrite has produced |  | | Report (issue) | | geochemistry of parts of North-west England and North Wales Keyworth, Nottingham 1997 This volume has been...geochemistry of pa,ts of North-west England and North Wales. (Keyworth, Nottingham: British Geological Survey...stream sediment in North-west England and North Wales BGS MAIN OFFICES AND SALES DESKS The full range...Office in Wales GEOCHEMICAL ATLASES Room G19, Sir George Stapledon Building, University of Wales, Penglais...1996 (0 85272 255 9) North-west England and North Wales 1997 (0 85272 307 5) Printed and bound in England |  | | 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) | | F4 Fs iL a7 aa me | _ ae a | ' 4 | Piz 4 Wales, d ae ae 4 ; Front cover Aber Falls. Face...Research Council British Regional Geology North Wales THIRD EDITION By Bernard Smith, MA, and T. Neville...publications relating to the geology a of North Wales 82 89 iv ILLUSTRATIONS FIGURES FIG. 1. 2....36. IN TEXT PAGE The rock succession in North Wales ae mn us de mi sen ff Geological map of Anglesey...of Pre-Cambrian rocks on the mainland of North Wales Re a os = A ae ee mee? Cambrian fossils .. ne 2 | | | 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) | | 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 | | | 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 (issue) | | of the complex Lower Palaeozoic geology of North Wales. The present account is designed to be read in conjunction...section ofCurig Hill 19 9 The Llugwy Valley and Moel Sia.bod 22 10 Massive tuff in the Lower Crafnant...Lower Rhyolitic TuffFormation, Dolwyddelan 34 17 Moel Sia.bod 35 18 Correlation ofthe Lower Crafnant Volcanic...the Bedded Pyroclastic Formation 39 21 View from Moel Sia.bod 44 22 Photomicrograph of dolerite with ophitic... the district now forms part of the county of Gwynedd and falls within th·e Snowdonia National Park. |  | | Book | | WORCESTERSHIRE 70 70 YORKSHIRE MINERAL LOCALITIES IN WALES . ANGLESEA 72 72 72 72 . BRECKNOCKSHIRE CAERMARTHENSHIRE...f'e.) when it crystallizes in a cube is called Pyrite, but when it is found in a crystal of the prismatic...Leadhillite, prismatic. Susannite, rhom bohedral. Fe 82. Pyrite, cubic. Marcasite, prismatic. Sulphur also, whose...PYROLUSITE Sulphur Manganese Oxygen : { : Iron PYRITE 15.77 : : : : : : { Lead : Oxide of Lead...20.00 s MINERAL LOCALITIES IN ENGLAND AND WALES. NOTE . When the name of a metal is put in capital |  | | Journal (article/letter/editorial) | | interstitial quartz and the iron may be derived from the pyrite which is widely present in these rocks. The source...Palaeozoic greywackes of southern Scotland and Wales which Bailey (1930, pp. 85-90) examined in the field...greywackes of the Cambrian Harlech Grit Series of North Wales. He considered that the matrix was detrital clay...Silurian Nantglyn Flags and Lower Ludlow Grits in Wales (Cummins, 1959 (a), p. 164; 1959 (b), p. 171); and...Silurian Nantglyn Flags and Lower Ludlow Grits of Wales (Cummins, 1959 (a), p. 164; 1959 (b) p. 171). Mesozoic |  | | Journal (volume) | | 112 120 BOOK REVIEW ‘‘Gold Occurrences in the UK’’ Norman Moles Journal of the Russell Society, volume...The current ‘History of Mineral Collections’ in the UK is not even a ‘History of Kings and Queens’. A small...confirmed by XRD at Amgueddfa Cymru National Museum Wales. It may be of interest to potential authors to note...metallogeny in Wales. A detailed analysis of deformed pre-Acadian lodes in north Wales, copiously illustrated...Natural Science at Amgueddfa Cymru National Museum Wales, where John is an honorary research associate. |  | | Book | | ) PLATE I, FRONTISPIECE THE MINERAL WEALTH WALES AND ITS EXPLOITATION TREVOR M. THOMAS M.SC.,...the Geology Department of the National Museum of Wales have always been placed at the disposal of the author...Geography and Anthropology, University College of Wales, Aberystvryth, for his sustained interest during...Keeper of the Geology Department, National Museum of Wales, kindly assisted in the selection of some of the... 1 WEALTH AND COAL MINING IN THE SOUTH WALES II COALFIELD RECENT TRENDS GENERAL CONSTITUENT |  | | Report (issue) | | BRITISH GEOLOGICAL SURVEY British Regional Geology Wales ll/1 F Howells ©t\/ERC2007 BRITISH GEOLOGICAL...Keyworth, t'--lotti ngha m t'--IG 12 5GG Printed in the UK by Halston Printing Group, Amersham, Buckinghamshire...13 Avalon Terrone 20 Coedana Complex South-west Wales and the borders 3 Cambrian 24 25 St David's...30 31 32 33 Geology of \/Vales 2 Topography of Wales 3 Distribution of continents in Late Proterozoic...Welsh Basin, mid-Caradoc 56 Pitts Head Tuff, 1V1oel Hebog, logs and environmental interpretation 61 Depositional |  | | Report (issue) | | establishment of a sedimentary basin that covered all of Wales, much of England, parts of lreland and extended...the end of the Tremadoc. Although m uch of orth Wales wa. emergent at this time, Lynas ( 1 973) showed...n syncline which plunges south, and the faulted Moel Goedog syncline which plunges north ( Figure 1 )...silty mudstone, commonly with lenses and laminae of pyrite o r pyrrhotite with minor amounts of other sulphides...suite is domi nated by sphalerite, galena, and pyrite with rare chalcopyrite . The other, whi ch i nclu |  | | Book | | provided by: Amgueddfa Cymru (National Museum of Wales, Cardiff); British Geological Survey, Edinburgh...tellurob:smu'Ji::eC!ogau andVigramines,nr Oolgellau, Gwynedd, Wales t!.e'.don ra:::ayqJarry,nr o~eha'Tlp'.:i. ...United Kingdom, including England, Scotland and Wales, arc here referred to as Britain. The offshore teITitorics...but two). but these. along with many others in Wales, were swept awa) with the introduction of administn1tive...followed by Benallt mine. Lleyn Peninsula, Gwynedd, Wales (4). Three localities (one in England and two |  | | 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 |  | | Book | | Ordovician fan deltas and bra idplain deltas, North Wales: a consequence of varying 0uvial elastic input G...Earth Sciences University of Leeds Leeds LS2 9JT UK Colmenero, J .R. Department of Geology University...Sciences University of East Anglia Norwich NR4 7TJ UK Dabrio, Cristino J. Department of Stratigraphy University...RG6 2AB UK Leeder, M.R. Department of Earth Sciences University of Leeds Leeds LS2 9JT UK McPherson...9JT UK Orton, G.J. Department of Earth Sciences Oxford University Parks Road Oxford OXl 3PR UK CONTRIBUTORS |  | | Book | | kearning an |Accession no The Geology of England and Wales Books are to be returned on or before the last date...Pankhurst (UK) Society Books Editors John Gregory (UK) Jim Griffiths (UK) John Howe (UK) Phil Leat (UK) Nick...Nick Robins (UK) Jonathan Turner (UK) Society Books Advisors Mike Brown (USA) Eric Buffetaut (France) Reto...Reto Gieré (Germany) Jon Gluyas (UK) Doug Stead (Canada) Randell Stephenson (Netherlands) Geological...England and Wales. The N.H. & Soper, N.J. 2006. The Acadian Orogeny: The mid-Devonian fp and Wales. Jn: BRENCHLEY |
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