 | | 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 |  | | Journal (volume) | | non-member subscription rates for this volume are: UK £13 (including P&P) and Overseas £15 (including P&P)...Editorial Board. ISSN 0263 7839 FRONT COVER: A group of colourless, transparent baryte crystals (6×2...Collection; photo John Chapman. BACK COVER: A group of white, translucent, prismatic calcite crystals...mineralisation of Snowdonia and the Llŷn Peninsula, North Wales John S. Mason 93–105 Andradite-bearing skarn-like...suspected palaeogene dyke from Coed y Brenin, North Wales John S. Mason, Martin Liezers and Tom F. Cotterell |  | | Journal (volume) | | Caernarfon, Gwynedd, Wales Tom F. Cotterell and Michael S. Rumsey 17–23 Ganophyllite-group minerals from...from the manganese mines at Rhiw, Pen Llŷn, Gwynedd, Wales, including the first British occurrences of...from Bennalt Manganese Mine, Rhiw, Pen Llŷn, Gwynedd, Wales: a first British occurrence Alan Dyer, David...a Roman lead smelter near Llancynfelyn, Central Wales John S. Mason 32–35 The mineralogy of Pim Hill...silica-poor alkaline igneous intrusive complex. Moving to Wales, three papers continue the story of manganese mineralisation |  | | Book | | ........................... 529 G: gadolinite group to gyrolite ......................... 226 X: xanthiosite...provided by: Amgueddfa Cymru (National Museum of Wales, Cardiff); British Geological Survey, Edinburgh...further 154 species are unconfirmed. If all the group, series, variety and discredited species names are...tellurob:smu'Ji::eC!ogau andVigramines,nr Oolgellau, Gwynedd, Wales t!.e'.don ra:::ayqJarry,nr o~eha'Tlp'.:i. ...revision to mineral-group nomenclature has only recently been published (Jan. 2008), most group names in MB/ |  | | Journal (article/letter/editorial) | | they may rest unconformably beneath the Newcastle Group or its equivalents. The possible existence of this...Etruria Marl facies are known at horizons below this group in several coalfields. The term " Etruria Marls...Boulton (1916-17, p. 249) partly to the presence of chlorite and epidote ; epidote has not, however, been found...the formation of the Etruria Marl Group as a whole. Much of this group is represented by fine-grained material...junction between the Marls and the overlying Newcastle Group, in those of the Chesterton area which exhibit the |  | | Journal (volume) | | non-member subscription rates for this volume are: UK £13 (including P&P) and Overseas £15 (including P&P)...Cadair Idris, North Wales. Field of view 20 mm across. National Museum of Wales specimen (NMW 2016.13G...Ordovician pillow basalts from Cadair Idris, North Wales John S. Mason 42–50 Journal of the Russell Society...John Mason takes us across the border into North Wales to consider the geology and mineralogy of some exhalative...to join the committee of the History of Geology Group and he became a Vice Chairman in 2012, serving until |  | | Book | | other crags are formed by underMiddle Limestone Group, Carboniferous Limestone Series. Looking east from...for Aegirine, q.v. actinolite. A member of the group of monoclinic amphiboles, CaO-3(Mg, Fe)0.4Si0 2...ferric oxide coloured bands which or a ferruginous chlorite. agglomerate. A coarse-textured rock, consisting...ammonites. A A fine silky variety of asbestos. group of extinct cephalopoda related to the Nautilus,... to the Cretaceous. amphiboles. An important group of dark-coloured rock-forming minerals, analogous |  | | Journal (issue) | | TR19 7SU Tel: (0736) 788305 Wulfenite (Mexico) UK Journal of Mines and Minerals Issue No 5 SUMMER1988...Rand.inc.p&pperissue The Decline of Mining in Mid Wales and Prospects of Revival S.J.S. Hughes 12 AUSTRALIA...part of the southern section of the Harlech Dome in northwest Wales. The quartz veins are only significantly...free) dolomite. Allanite - (Ce) This epidote group mineral is quite abundant as attractive crystals...Engine House Photo: T. WolloxaJJ. Metazeunerite, group of crystals 15mm. Photo courtesy of Mrs. Y. Barstow |  | | Book (edition) | | ROCK-FORMING MINERALS The Silica Group The Felspar Group The Felspathoid Group 73 - ' - - - . - - ...Amphibole Group The Pyroxene Group The Olivine Group The Mica Group The Scapolite Group The Garnet Group The...Tourmaline Group The Epidote Group The Phosphate and Fluoride Group The Iron-Ore Group The Spinel Group The...Zircon Group The Titanic Acid Group The Carbonate Group The Zeolite Group The Chlorite Group - . -...Igneous Geol. Surv., 1904, p. 209.) rocks of North Wales have an outcrop which indicates a laccolithic origin |  | | Book (edition) | | petrographic description of each important rock-group includes, or is followed by, an account of the distribution...of things we can do little about it; but for one group of rocks that are much to the fore at the present...FELSIC MINERALS Feldspars; Feldspathoids; Silica Group Ill ACCESSORY AND SECONDARY MINERALS 97 The Normal...Contamination; Zeolites; Epidote Group; Chlorite, Serpentine Group; the Carbonates; Talc Part II: Modes... ILLUSTRATIONS flG. PAGE 1. Tetrahedron and SiO4-group 2. The atomic structure of olivine 3. The atomic |  | | Book (edition) | | The Silica Group The Felspar Group 81 85 The Felspathoid Group 98 The Amphibole Group 104 The Pyroxene...Pyroxene Group 110 The The The The Olivine Group Mica Group Scapolite Group Garnet Group 118 120...125 The Tourmaline Group 125 The Epidote Group The Phosphate and Fluoride Group 128 The The The The...The The Iron - Ore Group Spinel Group Zircon Group Titanic Acid Group Carbonate Group - 129 131 . 133...133 134 135 138 The Zeolite Group 140 The Chlorite Group 141 Other Hydrated Silicates 142 Contact |  | | Book (edition) | | closely packed round a silicon atom, giving an Si04-group. The oxygens lie at the corners of a tetrahedron...fits snugly into fig. 1 Tetrahedron and SiCU-group. The small silicon atom is hidden between the four...surrounded. Thus an Al3+ in the centre of an octahedral group of O’s, has a positive charge of three units to...scientifically, felsic and mafic respectively. The mafic group comprises the ferro-magnesian silicates: the olivines...feldspathoids respectively, and the silica group. OLIVINES This group comprises a number of important rock-forming | | | Book (edition) | | closely packed round a silicon atom, giving an SiO4 -group. The oxygens lie at the corners of a tetrahedron...snugly into M,K.W. FIG. I Tetrahedron and Si04-group. The small silicon ato1n is hidden between the four...surrounded. Thus an AP+ in the centre of an octahedral group of O's, has a positive charge of three umts to share...scientifically, felsic and mafic respectively. The mafic group comprises the ferro-magnesian silicates: the olivines...feldspathoids respectively, and the silica group. OLIYINES This group comprises a number of in1portant rock-forming |  | | Book (edition) | | Ordovician Period, when the volcanoes of North Wales and the Lake District formed a volcanic archipelago...(muds and clays). The stable minerals of the fourth group, �uch as quartz, zircon, and tourmaline, are of...ments form an extremely variable and heterogeneous group of rocks, so that it is difficult to draw up a simple...most satisfactory method of classification is to group the sediments accord ing to their environment of...Familiar examples of sediments belonging to this group are gravel, sand, mud, and clay, and their consolidated |  | | Book (edition) | | commonly have several variants, such as Great Smoky Group, Great Smoky Conglomerate, Great Smoky Formation...If used on level 1, Term set options are: rock group (carbonate rocks, chemi¬ cally precipitated rocks...was adopted. Broader Term (BT, BX, BA, BZ) - A group of which the Term is a member or an area in which...Term (NT, NX, NA, NZ) - A specific mem¬ ber of a group which is represented by the Term or an area within...Term is a member. For example: peridot BA olivine group BA nesosilicates BA orthosilicates BA silicates |  | | Book (edition) | | Ozark sierra is, in Spanish, the name of a ridge or group Mountains, etc. closely related in position ; ...border-oceans. in New — the larger of South Wales, facing The the southeast shores, have peaks 5...island is elongated in the same direction with the group. This direction is nearly northwest (N. 40° W.)...the Loyalty Group. The Salomon Islands, farther northwestward, are also a linear — group. The chain...island trend. The course is is linear, like the group, and with the same northwest-by-west, the length |  | | Book (edition) | | ee 495 List J NiptaiOLOLike SOCKS. : aay 23 Wales List K Sedimentary structureS..............0-seee... a. Geographic Coordinates peridot BA olivine group nesosilicates orthosilicates silicates BT minerals...(BT-NT) relationship is that of a group to an individual in the group, e.g., BT minerals to NT silicates...of the specific minerals in the olivine group, the olivine group is one of several mineral groups in the...reciprocals are: olivine group NA peridot nesosilicates orthosilicates NA olivine group NA nesosilicates silicates |  | | Book | | Reflection spectra of PbCl2 single crystal (space group Pnma) obtained by light polarized parallel to a...may be observed in this interval too. The factor group method is regularly used for calculation of the...Ti–O 549–627 Tetragonal pyramid (lamprophyllite-group minerals, fresnoite, natisite, paranatisite) V...Al–O 550–630 Octahedron Al(OH)6 in ettringite-group minerals. Additionally, the band of O–Al–O bending...Si–O 720–760 Octahedron Si(OH)6 in ettringite-group minerals. Additionally, the band of O–Si–O bending |  | | Book (edition) | | 29 )':2/*:"'°'"<^c r^ NORFOLK wales/// /FRIENDLY .>::;i-' \group ^.ra,4.5^^/,.^' \ 21 15 . f...sierra is, in Spanish, the name of a ridge, or group of direction, : ridges, of serrated or irregular...converted the In this way high plateaus region into a group of peaks, ridges, and valleys. have often been sculptured...extreme north. The Australian Alps, in New South Wales, facing the southeast shores, have peaks 5000 to...arrangement and even each island -.; (Fig. 20) ; the group. This direction is elongated in the same direction |  | | Book (volume) | | Middle Temple. Charity Commissioner for England and Wales. Chicheley. Formerly Assistant Secretary of the...part). China: Language (in part), Childrenite; Chlorite; Chromite; Chrysocolla; Clintonite; Cobaltite;...address to the king on the marriage of the prince of Wales. The occasion was one of compliment, and there is...became groom of the bed-chamber to the prince of Wales. In this new position his hostility to the govern¬...organized existence after the death of the prince of Wales in 1751. Then in regard to the important question |
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