 | | Journal (article/letter/editorial) | | in his magnificent work on the Geology of North Wales. I have had the satisfaction of finding that Prof...restricted in this article to a schistose compound of quartz, felspar, and mica or hornblende, and is not applied...perfectly indistinguishable from the Twt Hill rock; the quartz has the same glazed surface, both conglomerates...places at random, they consist of white quartz, grey quartz-rock, mica-slate, green schist, jasper, purple...purple slate, a granitic rock of quartz and felspar with sometimes a little mica, blue felspathic trap |  | | Journal (article/letter/editorial) | | at Menai Bridge, 560. Arnold-Bemrose, H. H., A Quartz-rock in the Carboniferous Limestone of Derbyshire...Earth Deposits in New South Wales, 227. Cave of Ty Newydd, Tremeirchion, N. Wales, Exploration of, 569. Caves...Codrington, T., Submerged Rock-Valleys in South Wales, Devon, and Cornwall, 188. Coelacanthus Kayseri...of the Lower Carboniferous Rocks of England and Wales, 342, 506. Corval, The Geology of, 85. Cretaceous...Pittman, E. F., Radiolarian Rocks of New South Wales, 574. Davos Valley, On the Structure of the, 93 |  | | Journal (article/letter/editorial) | | throughout; others have a central cavity filled with quartz. The author describes varieties of the pyromerides...apparently to contraction, which have been filled by quartz. Sometimes also they scale off in rudely crescentic...or collected by himself, and by discussing the quartz-filled cavities which occur in certain cases. These...2. " On the Exploration of Ty Newydd Cave near Tremeirchion, North Wales." By the Kev. G. C. H. Pollen...erratics from the North and from the central areas of Wales, not a fragment of anything but immediately local |  | | Journal (article/letter/editorial) | | minor flexural slip folds imposed on the Central Wales anticlinorium. Exposures also occur 1.6 kmeastof...thickness of Lower Palaeozoic rocks in Central Wales, but several factors supported this study. T h e...shows six turbidite cycles in a specimen from Ty-newydd [SN 6969 87241. T h e length of the specimen is...43689, E 51419). (4 Sandstones and siltstones. Quartz is the dominant detrital constituent of these rocks... Plate 3. Turbidite cycles in specimen from Ty-newydd, nr Bwlch-glas. Length of specimen-28 from right |  | | Journal (article/letter/editorial) | | minor flexural slip folds imposed on the Central Wales anticlinorium. Exposures also occur 1.6 kmeastof...thickness of Lower Palaeozoic rocks in Central Wales, but several factors supported this study. T h e...shows six turbidite cycles in a specimen from Ty-newydd [SN 6969 87241. T h e length of the specimen is...43689, E 51419). (4 Sandstones and siltstones. Quartz is the dominant detrital constituent of these rocks... Plate 3. Turbidite cycles in specimen from Ty-newydd, nr Bwlch-glas. Length of specimen-28 from right |  | | Journal (article/letter/editorial) | | dismissed in Profcssor Ramsay's memoir on North Wales in a few brief sentences, and has not, so far as...crystallized micaceons or chloritic minerals with some quartz, the foliation being parallel to the bedding. The...bridge, we observe in the fields on our left, near Ty Newydd, a long craggy mass of serpentinous Downloaded...contorted, a n d ~here is a small mass of serpentine near Ty Ucha (reached b y crossing a causeway over an inlet);...information as to names in these wild parts of Wales ; the spot must, be very near the division between |  | | Journal (article/letter/editorial) | | volcano of Bhobell Fawr, north of Dolgelley, in Wales, which were arrived at by Mr. T. H. Holland and...commonest minerals in basic igneous rocks throughout N. Wales. These are all the occurrences of undoubtedly holocrystalline...grey-green andesite of the cliff westnorth-west of Ty-mynydd-y-newydd, a rock that looks merely like a baked ash...up on the north-west spur of the mountain, east of Ty-canol, and west of the hollow of the Geirw, there...north north-east of Graig Fach and south-west of Ty-newydd-y-mynydd. It has a specific gravity of 2-77. South-west |  | | Journal (article/letter/editorial) | | reliance on geolog- pierced in every direction by mine shafts ical evidence as opposed to that derived...principal task. The committee on the Ty Newydd Caves in North Wales presented their final report in which...atmospheres, he had produced granulation in the quartz identical with that seen in silicate meteorites |  | | Journal (issue) | | to the whole line of Silurian deposits in South Wales, from Llandovery to St. Bride's Bay. By direction...Series, vol. iv. p. 337. In the 'fbe dyke of Plas Newydd, which produces remarkable metamorphic effects...the Grau wacke (now called Silurian) rocks of Wales and the limestone of the English border, from Llaugollen...made public, of the progress of his researches in Wales, begun in 1832 and 1834, contemporaneously with...North Wales. In Proceedings of the Geological S ociety, vol. iv. p. 212. The strata of North Wales are |  | | Journal (article/letter/editorial) | | Betterton, W.J. 1990. Glauconite Spherules and Shocked Quartz at the K-T Boundary in DSDP Site 603B [abstract]...Atlas of onshore Sedimentary Basins in England and Wales. Post-Carboniferous Tectonics and Stratigraphy....Eocene succession at Whitecliff Bay, Hampshire Basin, UK. Journal of the Geological Society of London, 154...Oligocene of the Isle of Wight (Hampshire basin), UK. Clay Minerals, 36, 447-464. Ingles, M. & Ramos-Guerrero...a lower Carboniferous paleosol sequence, South Wales? Clay Minerals, 22, 109-118. Smit, 1. & Kyte, T |  | | Journal (article/letter/editorial) | | ~he western side of the Conway Valley in North Wales rises the rugged Ordovician mountain mass that culminates...the main road to the uplands and north-eastern Wales takes advantage of the gap, the position of which...continuity of the sections, and is accompanied by quartz-veining and disturbance. On the south, across the...is often accompanied by gash-fracturing and vein-quartz intrusions. Good examples are seen at Bwlch-y-gwynt...closely that of the Carboniferous of north-eastern Wales than that of the Ordovician. Structure of the Disturbed |  | | Journal (article/letter/editorial) | | north of the last section, between Ty newydd and Tyn rhos, quartz-felsite (Note 7, p. 126) is seen at...The schistose series at Ty Croes is brought into contact with the principal quartz-felsite and halleflinta...ground-mass of each consists chiefly of microcrystalline quartz and felspar, of very indefinite outline and arrangement...structure not uncommon in felsites.1 The larger quartz and felspar grains are generally ragged 1 Described...ground-mass, are minute scales of a clear mica. The quartz is very clear. Magnetite (with some haematite) |  | | Journal (article/letter/editorial) | | at. (1992) reported on the discovery of shocked-quartz grains from a Tr-J boundary location in northern...g. Mossman et al., 1998). A search for shocked-quartz at Tr-J boundary locations in Nova Scotia (Canada)... even if the discovery of a layer with shocked quartz in Italy confirmed (work is currently in progress...picture (Kirkham, 2003, fig. I I) of a shocked-quartz grain does look convincing; thus, the interpretation...the pap er by Kirkham (2003). Only one shocked-quartz grain is shown, and it is noted that they are rare |  | | Report (edition) | | ENGLAND 1�ND W..t�LES. THE GEOLOGY OF THE SOUTH· WALES COAL-FIELD. PART VII. THE COUNTRY AROUND AMMANFORD...part of the l\femoir on the Geology of the Sol1th Wales Coalfield, is illustI·ated in Sheet 230 of the New...made between the Carboniferot1s rocks of South Wales and Devonshi1·e than was fo1�merly possible. The...phenomena are finely developed in this part of' Sot1th Wales. For the most part the ice moved southwarils, crossing...assistance has been rende1,ed by mining engineers and mine•managers within the limits of the Coalfield. Our |  | | Report (issue) | | Cennen Valley and adjacent areas, south-east Dyfed, Wales • , � 'f": ... 'lit "• ( �, 4 .., • • •...Cennen Valley and adjacent areas, south-east Dyfed, Wales H. C. Squirrel! and D. E. White Petrography: R....Cennen Valley and adjacent areas, south-east Dyfed, Wales H. C. SQUIRRELL and D. E. WHITE Des couches...Cennen Valley and adjacent areas, south-east Dyfed, Wales. Rep. Inst. Geol. Sci., No. 78/6. Authors and contributor...Ammanford (230) Sheet in south-east Dyfed, South Wales (Fig. I ). The area was resurveyed on a scale of |  | | Report (edition) | | SURVEY ENGLAND AND WALES EXPLANATION OF SHEET 248 • THE GEOLOG1- OF THE SOUTH WALES CO.A.LFIELD PART...condition of the Rhretic g�oup in. this part of South Wales is well exhibited near Pyle, but a full account..... H. K. Jordan oi his researches on the South Wales Coalfield .. Some new oollieri,es referred to in...and Cockshot Rocks, and the chief coals J Grits, quartz-conglomerates and sbales Limestone 1 Triassic...consists of an alternation of �ts (quart zites), quartz-conglomerates and shales. Although l1tholog1cally |  | | Journal (article/letter/editorial) | | within spheres. They are accompanied by shocked-quartz and probably pseudomorph altered glass spheres...considered. Ty Newydd, 5 Greys Hollow, Rickling Green, Saffron Walden, Essex CBll 3 YB, UK (email: kirkhama@compuserve...highly-disordered smectite and traces of alpha quartz. Addition of a few drops of water to the spherulitic...'unstructured' glauconite, plus a few silt-sized quartz grains and fragments of fragmented spherules. (b)...concentrations (Andy Beard, pers. comm.). Shocked-quartz and high-pressure mineral polymorphs (e.g. coesite |  | | Book | | a major part of the Silurian outcrops of North Wales, an area of classic and, in the past, controversial...1601) BRITISH GEOLOGICAL SURVEY England and Wales P. T. WARREN, D. PRICE, l\tl.J. C. NUTT and Geolo=~...0 11 884225 0 British Regional Geology North Wales, 3rd Edition, 1961, reprinted 1979. Bibliographicalreference...also avail.able throughbooksellers Printed in the UK for HMSO Dd7 17073 C20 9/84 V PREFACE This...briefly described by Ramsay in his memoir on North Wales published in 1866, with a second edition in 1881 |  | | Journal (article/letter/editorial) | | of the most conspicuous features upon a map of Wales is the great south-western extension of Carnarvonshire...coast, which will bear comparison with any in North Wales. The present coastal outline of the peninsula is... W.G. FEARNSIDES.--'Geology of North & Central Wales' in ' Geology in the Field.' (Jubilee vol. Geol...difficult to obtain a specimen showing a fresh surface. Quartz in small clear grains or bigger millry grains forms...in texture once more in the uppermost 200 feet. Quartz is, of course, by far the most abundant constituent; |  | | Report (volume) | | NORTH WALES. P.A.RT I.-WEST SHROPSHIRE, . SMITH, ~I.A. P.A.RT II.- BY BERNARD NORTH WALES, BY HENRY...PRE-CARBONIFEROUS ROCKS OF WEST SHROPSHIRE AND NORTH WALES. p .ART I.-WEST SHROPSHI RE, SMITH, M.A. BY BERNARD...the otherwise difficult task of reading the old mine plans. The memoir has been edited by l\fr. Cantrill...T,Vestern Area: Hope-Shelve District Nick Knolls Mine, 13. Batholes lVline, 13. East Roman Gravels 1,:1ine...22. Myttonsbeach Mine, 25. Perkins Beach Mine, 25. Burgam l\fine, 26. Tankerville :Mine, 26. Potter's Pit |  | | Book | | mineral collection (GS 673). a Euhedral prismatic quartz, coated by white albite. Specimen size JO cm. NMvV...euhedral quartz. Field of view 9 cm . NWV 27.l l l .GR376. c Close-up of pectolite on quartz. Field of....GR29 8 357. d Radiating pectolite crystals in quartz. Field of view J 0.5 cm . I .M,,V 27.lll.GR29....for 1:50 000 Geological Sheet 134 (England and Wales) Biostrettigraphy WT Dean F ~1artin Geochemist...University D ~1cCarroll, BA, PhD University of Wales, Swansect CONTRlBUTORS R £ Bevins, PhD, CGeol JM |  | | Report (Issue volume) | | GEOLOGICAL SURVEY. ENGLAND AND WALES . THE GEOLOGY OF THE SOUTH WALES COAL-FIELD. PART X. THE COUNTRY...OF SOUTH WALES. MAPS. GENERAL MAP ON THE SCALE OF ¼ INCH=:=: t MILE (1 to 253440). South Wales, with parts...parts of Central Wales and North Devon and Somerset, is included in Sheets 14, 18 (with part of 17), and...ENGLAND 1\.ND \VAI4ES. THE GEOLOGY OF THE SOUTH WALES COAL-FIELD. PART X. THE COUNTRY AROUND CARMARTHEN...of· the �Iemoi1· on the Geology of tl1e 8011th Wales Coalfield, is illl1strated i11 Sheet 229 of tl1e |  | | Report (Issue volume) | | GEOLOGICAL SURVEY OF GREAT BRITAIN ENGLAND AND WALES Geology of the South ales Coalfield SPECIA-L. MEMOIR...Strahan, from 1901-4. The resurvey of the South Wales Coalfield, commenced after the last war in the Pontypridd...shown by many other ·N.C.B. officials, both deep-mine and opencast, ·who, realizing the important part...correlation .. 128 .. with other parts of the South Wales Coalfield .. .. •• Vll Flo. 20. Horizontal sections...of Cynheidre Colliery, a new large-scale horizon mine, and by the underground work in the colliery, in |  | | Report (Issue volume) | | Listed MEMOIRS OF THE GEOLOGICAL ENGLAND & WALES. ANGLESEY . IN TWO VOLUMES. VOLUME II. SURVEY...types : green , brown -crusted rocks, too poor in quartz even to the naked eye to be called grits, usually...recall, has never yet been identified in North Wales, and may be represented in part by volcanic rocks...HILL AND CAREG -ONEN ROCKS AND CAMBRIAN PERIOD . quartz -felsite with good rhyolitic structure. The coarser...fragments of the local schists , of quartzite, and quartz -mosaic, with small bits of lavas of spilitic aspect |  | | Book | | Humberside Northumberland Cumbria Isle of Man WALES 107 Io8 109 lIO II3 116 118 I29 130 Key map Radnor...southern England; central England; northern England; Wales: central and southern Scotland: and northern Scotland...immediately to the left of the lane. opposite a tall mine chimney on the right. Carn Gluze is in the care...of the mines can still be seen. About 250 blocked mine shafts have been counted. and they were around...brought from the Prescelly Hills in south-west Wales, the larger sarsen stones are thought to have come |
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