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| A Note on the Nosean Phonolite of the Wolf Rock, Cornwall By C. E. TILLEY '""T'HE first systematic descriptions...descriptions of the nosean phonolite of the _L Wolf Rock were given by Allport (Geol. Mag., 1871, p. 247;...247; 1874, p. 462). Later a fuller account of the rock was provided by Teall in his British Petrography...Petrography (1888, pp. 367-368). Since that time the rock has been repeatedly figured in text-books of petrography...request carried out a new analysis of the fresh rock, the results of which are provided in Table 1 (No |
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| information obtained by core sampling of the solid rock underlying the loose deposits on the floor of the...north-west of Cornwall and of nepheline phonolite from Epson Shoal, 6 miles east of the Wolf Rock. Other samples...in the northern part of the Celtic Sea (between Cornwall and Ireland), the loose late Tertiary and Quaternary...samples of older strata in the western waters, and the rock exposed in several submarine banks lying off the...the core obtained did not penetrate to the solid rock or no core was obtained at all, are GEOL. MAG. VOL |
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| rocks, principally phonolites. Association: Sanidine, mica, leucite, magnetite, ilmenite, titanite...Aldis, and Cournil, Cantal, France. At Wolf Rock, Cornwall, England. From Covao, Cape Verde Islands. South...(2) Deer, W.A., R.A. Howie, and J. Zussman (1963) Rock-forming minerals, v. 4, framework silicates, 289{302 |
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| GRANITES AND SOME ASSOCIATED ROCKS FROM SOUTHWEST ENGLAND I. A. MILLER AND P. A. MOHR New isotopic age determinations...determinations on all the granites of southwest England are presented and discussed in relation to the...Hercynian orogeny, are discussed. Age data on the Wolf Rock and Epsom Shoal phonolites are presented; their...INTRODUCTION The Hercynian granites of southwest England have in part been the subject of potassiumargon...the period of the Hercynian orogeny in southwest England in relation to other parts of Britain and Europe |
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| chlorite); 7 organic minerals; 4 pseudomorphs; and 2 rock names. The details are incorporated in the individual...first discovered in the British Isles (14 from Cornwall; 2 from Somerset; 1 from Cheshire; 2 from Scotland;...H. G. M A C P H E R S O N from England (75 of which are from Cornwall); 28 from Ireland; and 10 from...Thus, of the 130 species, 64 are from England (48 from Cornwall); 35 from Scotland; 19 from Ireland; and...regional lists as, for example, for SW England, Pennines and northern England, Wales, Ireland, Scotland, etc |
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| iron contents of the nepheline.For example,iron sanidine prepared by Wones and Appleman (1961) has a B...much higher than the normal B refractive index of sanidine (I.522). Two crystalsof the nephelinefrom Ol Doinyo...with analysesof nepheline from the Wolf Rock phonolite Figure -Cornwall. A photograph of a nephelinecrystal...(centers); Or37for 88-16 (centers); and Orar for the Wolf Rock phonolite. These values represent estimated bulk...structure and composition of a phonolite trom the "Wolf Rock". Geol.Mag 8,247 250 BnNNrsren, F. A. ANDM. H |
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| district featured on Maton 's geological map of Cornwall in 1797 and accounts, both of the minerals and...youngest igĀ neous rock in the area is the early Cretaceous phonolite of Wolf Rock. Small outcrops of...Memoir for 1: 50 000 geological sheets 351 and 358 (England and Wales) LONDON: HER MAJESTY'S STATIONERY OFFICE...British Geological Survey, Sheets 351 and 358 (England and Wales). Authors A J J Goode, BSc and R T Taylor...preceded by E refer to specimens in the English slicecl rock ccJllection, British Geological Survey, Keywc>rth |
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| Atlas of rock-forming mineral! in thin section W.S.MacKenzie and C.Guilford Digitized by the Internet...http://archive.org/details/atlasofrockformiOOmack Atlas of rock-forming minerals in thin section W.S.MacKenzie...Limited Longman House Burnt Mill, Harlow, Essex, UK Associated companies, branches and representatives...Cataloging in Publication Data MacKenzie, WS Atlas of rock-forming minerals in thin section. Includes index...25 Allanite (Orthite) 27 Pumpellyite 70 72 Sanidine 37 & Orthopyroxene intergrowth Aegirine-augite |
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| GENERAL 3 FOREWORD. textures nowadays require ROCK varying powers of the to be resolved under microscope...Chacewater, Cornwall Granite, Heidelberg Pegmatite, Thuringia Luxulyanite, Luxulyan, Cornwall 17 18 18...Nephelinite, Odenwald Leucitite, Capo di Bove The Wolf Rock Volcanic Tuff, Braid Hills Palagonite Tuff, Burntisland...Serpentine, Baste ; Nephelenite, Odenwald The Wolf Rock di Bove; Phonolite, Capo Volcanic Tuff, Braid...2nd Edition (Eightysix Illustrations and Text on Rock-Forming Minerals and Igneous Rocks). HUSSAK. Anleitungder |
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| Endsleigh House 50 Daniell Road Truro, Cornwall TR1 2DA England Printed in Great Britain by Short Run...that he knew of no place on earth that surpassed Cornwall in the number and variety of its minerals. Hogg's...is subtitled 'in wich [sic] is shown how much Cornwall contributes to the illustration of the science'...later by Collins' A Handbook to the Mineralogy of Cornwall and Devon' (1871; 1892 with addenda, the latter...mention Purser's 'Minerals and locations in S.W. England' (1974). The work was never published, although |
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| 462 S. AllportāOn Phonolite from the " Wolf Hock." Ninth.āThe deposition of the Boulder-clay and Moraine...present time. V.āNOTE ON THE PHONOLITE FROM THE " WOLF ROCK." By 8. ALLFORT, F.G.S. I N the GEOLOGICAL MAGAZINE...structure of a Phonolite which forms the mass of the Wolf ftock lying between the Land's End and the Scilly...that there can be no doubt of its presence in the rock ; the mineralogical composition of which is thus...a better and more characteristic specimen of the rock than those previously in my possession. It is in |
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| BOOK OF PETROLOGY CONTAINING A DESCRIPTION OF THE ROCK-FORMING MINERALS AND A SYNOPSIS OF THE CHIEF TYPES...materials of which the earth's crust is built up. A rock may be defined as a mineral aggregate, possessing...mode of aggregation of the constituent minerals, or rock-structure. In classifying rocks, we must allow...of the minerals since the first formation of the rock.1 The three rocks made use of in our example, may...whether the interior of the earth is occupied by rock in the molten condition, or by solid material at |
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| been investigated using 4Ā°Ar/39Ar analyses on sanidine, leucite, hornblende and nosean/hauyne for age...indicating different petrogenetic evolution for these two rock groups. The increased apparent K - A r ages of the...apparent ages of the noseans/hanynes. Leucite and sanidine phenocrysts may also occasionally be affected...situ produced prior to ( = inherited Ar) or after rock formation ( = radiogenic Ar sensu strictu). Applying...only exceptions appear to be noseans from the Wolf Rock phonolite [8] which compared to coexisting sanidines |
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| W. A. E. UssherāHistorical Geology of Cornwall. 27 compelled to give up all hope of succeeding, and...Cocos Islands and other parts of the Bay. The only rock seen where we landed was a conglomerate, or boulder-bed...consisted of a trachytic porphyry which contained sanidine, augite, and mica, in grey or pinkish matrices...volcanic activity. ā¢ t III.āHISTOKIOAL GEOLOGY OF CORNWALL.1 By "W. A. E. TJSSHER, F.G.S. T O ascertain...this paper, of the soundings around the coast of Cornwall, not heing executed in time, will appear in next |
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| materials of which the earth's crust is built A rock may be defined as a mineral aggregate, possessing...mode of aggregation of the constituent minerals, or rock- structure . In classifying rocks, we must allow...of the minerals since the first formation of the rock.Ā¹ The three rocks made use of in our example, may...whether the interior of the earth is occupied by rock in the molten condition, or by solid material at...eruption the pressure is relieved and the liquid rock injected in the direction of least resistance. According |
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| volcanic area of the Garlton Hills. Among these, the rock of Traprain Law especially attracted my attention...attention. It is a close-grained, dark brown to grey rock. Some varieties have a glistening or greasy surface...glancing cleavage surfaces of a clear glassy felspar (sanidine). The stone is quarried at the foot of the hill...character of the rock became apparent, Microscopic examination shows that the rock is a trachytic phonolite...description. The rock bears no resemblance to the well-known phonolite of the Wolf Rock, described by Mr |
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| Manchester MI3 9PL, UK 2 Department of Geology, The University, Sheffield $1 3JD, UK Abstract. Mineral...(Ne60Kseo)-An-Qz; and An-Ab-Or. Mineral and bulk rock compositional data together with textural criteria...69.3 (0.7) Ks 16.3 (0.4) Qz 14.4 (1.0) (mol %). Rock analyses were obtained by XRF techniques using fused...compositions, which are generally Ba-rich, to a sodic sanidine composition (Or49) (see Table 1, analyses a-d)...Olivine theralite, Otago, New Zealand (R 377). This rock is coarse grained with abundant, euhedral (possibly |
 | | Report (edition) |
| British Regional Geology I * South-West England r * FOURTH EDITION e ā - O ā ..y 1835 Geological...Mr. G. Bisson (District Geologist, South-West England), as well as Professor W. R. Dearman and the conĀ...volume [1966] of the Royal GeoĀ logical Society of Cornwall. The succeeding years have seen notable advances...in our knowledge of the geology of south-west England. Most of the great expanse of Carboniferous rocks...and Mining; Clay; Stone; Sand and Gravel; Peat; Rock-salt and Gypsum; Coal, Pigment and Oil; Soils; Water |
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| letās views Temperature and pressure involved in rock construction . - F volcanoes . Why cruptions...XVI.āHisrory Age of igneous rocks Granite of Cornwall Elvans Groby syenite and Mount "Sorel 228 229...Granite veins Veinstones . āi Phonolite of the Wolf Rock: 237 2338 240 242 248 250 251 Xii GENERAL...CuapreR In England . In Anglesey . Ć© . - 356] Gneiss . : 357 | Mica schist . Ć© 4 Quartz rock . 5 ...North-Western Scenery of gneiss and Scenery of quartz rock : > 343 345 ā 5 5 - 349 , - . : 2 0 |
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| palaeoenvironment and stratigraphic correlation of the UK Chalk. This work presents a review of some of the...a new stratigraphic division of the Chalk in the UK are evaluated. Key words: Upper Cretaceous, Chalk...University of Greenwich, Chatham Maritime, Kent ME44TB, UK (e-mail d.wray@gre.ac.uk) 1. INTRODUCTION 2. CHALK...inter-regional correlation. The Chalk of southern England was originally deposited as a fairly even fallout...identify primary millimetric lamination in onshore UK chalks. The current authors remain sceptical, as |
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| THEORIES OF PETRO GENESIS , A DESCRIPTION OF THE ROCK-FORMING MINERALS , AND A SYNOPSIS OF THE CHIEF...separation of the part treating of the classification of rock types from that dealing with their dis tribution...ROCKS Chapter Page 67 I. CLASSIFICATION OF THE ROCK-FORMING MINERALS 73 73 II. APPEARANCE UNDER THE...Double Refraction 79 III . DESCRIPTION OF THE ROCK - FORMING MINERALS 81 The Silica Group The Felspar...Determination of Rock -form ing Minerals, translated from the German by F. H. Hatch . J. P. Iddings. Rock Minerals |
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| the systematic analysis of individual rocks and rock suites. Some experimental results are of such f...important rock-group includes, or is followed by, an account of the distribution of the rock-types conce-rhed...been devoted to nomenclature and definitions of rock-types with the object of eliminating as many unnecessary...done, and the senior author has devised a number of rock-type names based on a new principle which, if approved...important rock-forming minerals with special reference to petrological aspects-their role in rock formation |
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| volcanic area of the Garlton Hills. Among these, the rock of Traprain Law especially attracted my attention...attention. It is a close-grained, dark brown to grey rock. Some varieties have a glistening or greasy surface...glancing cleavage surfaces of a clear glassy felspar (sanidine). The stone is quarried at the foot of the hill...character of the rock became apparent, Microscopic examination shows that the rock is a trachytic phonolite...description. The rock bears no resemblance to the well-known phonolite of the Wolf Rock, described by Mr |
 | | Book |
| book are available in the Harker CollecĀ¬ tion of Rock Slices in the Department of Mineralogy and Petrology...termed. When a magma cools it solidifies to give a rock that may consist of an aggregate of minerals, or...including glass when present, defines the texture of the rock. The nature of the texture developed depends mainly...the whole to solidify as a glass. The resulting rock is said to be holohyaline. Siliceous magmas are...ash-flow tuffs (see p. 214). (3) Hawkes, L., 1930. On rock glass, and the solid and liquid states. Geol. Mag |
| | Report (edition) |
| G .. Bisson (District Geologist, South--West England), as well as Professor W. R. Dearman and the conĀ...volume [1966] of the Royal GeoĀ logical Society of Cornwall. The succeedi11g years have seen notable advances...in our knowledge of the geology of south-west England. Most of the great expanse of Carbonifļæ½rous rocks...and Mining; Clay; Stone; Sand and Gravel; Peat; Rock-salt and Gypsum; Coal, . . . . Pigment and Oil;...age-determinations of rocks of south-west . . . . . . . Facing England 1 112 List of Geological Survey Maps and Memoirs |
