 | | Journal (article/letter/editorial) | | Fold Structures in the Mylor Beds, near Porthleven, Cornwall By MAURICE STONE (PLATES XIX-XX) ABSTRACT...reversed. I. INTRODUCTION The killas in western Cornwall consists predominantly of a pelitic to semipelitic...deformation, more phyllitic aspect and more intensive quartz veining of the former beds. More recently, Hendriks...marginal Gramscatho ". Structural evidence from near Loe Bar, considered later in this paper, suggests that... Fold Structures in the My/or Beds, near Porthleven, Cornwall 441 and recorded the two important fold |  | | Journal (article/letter/editorial) | | its northerly margin extends from the region of Porthleven to the mouth of the Helford River. In its physical...granite, flows past Helston in a deep valley to the Loe, the latter representing an ancient tidal estuary...converted into a fresh-water lake by the shingl e bar which has been piled across its mouth. The geology... XXIV. PLATE 33. [Photo by T. C. tteu. A.-LoE BAR NEAR HELSTON. [Pltoto by T. C. Hall. B.-GILLAN...that they were cleaved, brecciated and veined with quartz prior to such incorporation. It also contains fragments |  | | Book | | Twelveheads Press PO Box 59, Chacewater Truro, Cornwall TR4 8Z}. especially true of its minerals, some...rocks lie at the bottom of a sequence, but in Cornwall this becomes far from simple where rocks have...(metamorphism) of existing rocks. The land wl ‘ch is now Cornwall has seen periods of uplift and sinking beneath...conditions changed too, for the land that is now Cornwall was once close to the Equator before the action...are older rocks on the Lizard peninsula, most of Cornwall consists of Devonian rocks, known locally as “killas’ |  | | Book | | BIRD, Fs, Ce. The coasts of Cornwall c/551 .457094237 1899526013 | \ CORNWALL COUNTY COUNCIL LIBRARY SERVICES...SERVICES of Cornwall a Sconecy and Geology 1 anf on — -Fré . ide We < “~et The Coasts...Coasts of Cornwall Scenery and Geology with an Excursion Guide Eric Bird First Published by ey Alexander...Alexander Associates 1998 4 South Street, Fowey, Cornwall PL23 1AR e-mail: alex@nder.com www.nder.com ©...South Coast of Cornwall........ Chapter Four - Excursion - The North Coast of Cornwall....... th eS" |  | | Journal (article/letter/editorial) | | Physiography of South-West Cornwall. 21 The Physiography of South-West Cornwall, the Distribution of Chalk...Types of Valley in South-West Cornwall. I. District east of Porthleven. Evidence of superseded drainage...River Cober. C. The Loe and Lizard. Conclusions. II. District west of Porthleven. \ CONSIDERATION of...unexplained physical features of -^- both Devon and Cornwall does not hitherto appear to have been regarded...statement (3) : " The river system of Devon and Cornwall is obviously epigenetic but so complex and intricate | | | Book | | - .. CORNWALL COUNTY L IBRARY 11 I3 111 111 II 11 11 I 8009 02579 1911 -, , l./tPv ~ 6 JUN 2003...BIRD, E. C. F. The coasts of Cornwall c/551 .457094237 1899526013 CORNWALL COUNTY COUNCIL LIBRARY SERVICES...SERVICES The Coasts of Cornwall Scenery and Geology with an Excursion Guide Eric Bird 1 First Published...Alexander Associates 1998 4 South Screer, Fowey, Cornwall PL23 lAR e-mail: a1ex@nder.com www.nder.com ©... 6 Chapter One - Introduction The coasts of Cornwall . . . . . . . . . . . . . . . . . . . . . . . |  | | Journal (article/letter/editorial) | | com/locate/pgeola The Gramscatho Basin, south Cornwall, UK: Devonian active margin successions B.E. Leveridge...NG12 5GG, UK Camborne School of Mines, University of Exeter, Penryn, Cornwall TR10 9EZ, UK A R T I C...marine deposits of the Gramscatho Basin of south Cornwall reflect two tectonic regimes; Early to Middle Devonian.... . . . . . . . . . . . . . . . . . . Porthleven Sands–Loe Bar (SW 634 250–SW 641 243) (Site 10, B.E...lithosphere and the development of the South-West England passive margin, together with associated Lizard |  | | Journal (issue) | | report Field Trip reports Mud! & Hock (a poem) Cornwall field trip Maisemore Chairman's Report Treasurer's... Back in September ten of us travelled down to Cornwall for an extended field trip which, for some of...demonstrated were sediments of ash and mud penetrated by quartz minerals, where the the presence of chlorite indicated...geological theme they like!) EXTENDED FIELD TRIP TO CORNWALL - SEPTEMBER 2013 (Editor: Ross Whittaker has provided...field trip between the Royal Geological Society of Cornwall (RGSC) and the Cheltenham Mineral& Geological |  | | Book | | \lirtually no equipment, the pebble hunter in Cornwall can embark on a pastime that is healthy and relaxing...Europe. 4 - Ii A LI T TLE OF GEOLOGY I N Cornwall, as elsewhere, there are three main types of rocks...contains an excess of silica, shown by the presence of quartz crystals, it is an acid rock and is generally light...sedimentary rocks, and these are the most common type in Cornwall. As the name implies, these were laid down as...held together by a natural cement. Large areas of Cornwall are composed of rocks of these various types. |  | | Book | | Designed by BDP - Book D evelo ion,/ enzance, Cornwall o part of this 'Nork may be pho ocop:ed, stored...Penwith: St Just to St Ives Mount's Bay: Penzance to Porthleven Rivers Hayle to Cobe,·: H ayle to H elston Camborne-...Linkinhorne East Cornwall : Callington t o Calstock 36 40 45 50 56 61 66 70 74 Rocks of Cornwall 78 Precious...physical properties of minerals (pages I I 0- 1 I). Cornwall, for its size, has one of the most diverse ranges...1n museum collections such as hose of the Royal Cornwall Museum in Truro and the aural His ory Museum |  | | | | MEMOIRS OF THE GEOLOGICAL SURVEY OF GREAT BRITAIN ENGLAND AND WALES Geology of the Lizard and Meneage (Explanation...32, and 1n his classic Report on the Geology of Cornwall, Devon and West Somerset. The ?istrict has now...Greenstones and Doleritcs General characters, 1 56 ; Porthleven greenstones, 156 ; Helston greenstones, 159 ;...XVIII. Pliocene Deposits ... Pliocene deposits of Cornwall, St. Erth, St. Agnes, 165 ; Crousa Down gravels...schistose green schist and mica-schist, with veins of quartz, feldspar, epidote, etc. (A.7488) ... ... 37 |  | | Report (edition) | | MEMOIRS OF THE GEOLOGICAL SURVEY OF GREAT BRITAIN ENGLAND AND WALES Geology of the Lizard and Meneage (Explanation...32, and 1n his classic Report on the Geology of Cornwall, Devon and West Somerset. The ?istrict has now...Greenstones and Doleritcs General characters, 1 56 ; Porthleven greenstones, 156 ; Helston greenstones, 159 ;...XVIII. Pliocene Deposits ... Pliocene deposits of Cornwall, St. Erth, St. Agnes, 165 ; Crousa Down gravels...schistose green schist and mica-schist, with veins of quartz, feldspar, epidote, etc. (A.7488) ... ... 37 |  | | Journal (article/letter/editorial) | | Shear-Folding in the Mylor Slates, near Porthleven, Cornwall By M. STONE and J. L. M. LAMBERT ABSTRACT...in the Mylor Slates in the coast section betwen Loe Bar I EXPLANATION I I MYLOR SLATES GRAMSCATHO BEDS...the Mylor Slates variable offset of bedding and quartz-veins parallel to the cleavage has been observed...observed at numerous localities between Marazion and Loe Bar. Although this is regarded as definite evidence...of the Coastal Geology between Perranuthnoe and Loe Pool. Proc. Geol Assoc.,x\i, 117-147. HILL, f. B | | | Report (edition) | | MEMOIRS OF THE GEOLOGICAL SURVEY OF GREAT BRITAIN ENGLAND AND WALES Geology of the Lizard and Meneage (Explanation...32, and 1n his cl�ss1c Report on the Geology of Cornwall, Devon and West So-merset. The district has now...Greenstones and Dolerites General characters, 1 56 ; Porthleven greenstones, 1 5 6 ; Helston greenstones, 159...schistose green schist and mica-schist, with veins of quartz. feldspar, epidote, etc. (A.7488) ... . .. ......Rose Cottage, Porthallow (E.6201). 2. Hornblendic quartz-schist. west side of Trenance (E.6240). 3. Cor | | | Book | | by Alison Hodge, 2 Clarence Place, Penzance, Cornwall TRI8 2QA, www.alison-hodge.co.uk, info@alison-hodge...Cornish minerals. Thanks also to Michael Merry of Cornwall Devon Mineral Specimens (www. cornwalldevonmineralspecimens...Sara Chambers, Collections Manager, the Royal Cornwall Museum, Truro (www.royalcorn- wallmuseum.org...Penwith: St Just to St Ives Mount's Bay: Penzance to Porthleven Rivers Hayle to Cober: Hayle to Helston Camborne-Redruth:...Landreath to Linkinhorne East Cornwall: Callington to Calstock Rocks of Cornwall Precious Metals and Semi-precious |  | | Report (edition) | | clistauce. MEMOIRS OF THE GEOLOGICAL SURVEY. ENGLAND AND WALES. EXPLANATION OF SHEET 359. THE GEOLOGY...32, and in his classic Report on the Geology of Cornwall ., Devon and West Somerset. The district has now...supplied at the cost of drawing and colouring. CORNWALL. 75 NE., SE., by J. B. HILL; lodes by D. A. Mac...• •• , , XV.-Glacial Boulder on the Beach at Porthleven ... . 40 54 66 72 80 86 96 101 104 128 146...is found in the 11orth-west a1--ound B1·eage, Porthleven and Helston. At various places on the coast there |  | | Journal (article/letter/editorial) | | Gardens. REPORT OF AN EXCURSION TO THE LIZARD, CORNWALL. MARCH 20TH TO 2~TH, EASTER, 1913. Bv ]. S. ... EXCURSION TO THE LIZARD. the pebbles to be mostly vern-quartz with occasionally quartzschorl rock and sometimes...to be obtained on the mainland in this part of Cornwall, though the pillow-structure in the lavas is by...fine hornblendeschist, and, near Trenance Farm, quartz-hornblende-granulite, showing good bedding, though...was seen, a much less metamorphic rock than the quartz-granulites of the Old Lizard Head Series, though |  | | Journal (article/letter/editorial) | | from the Gramscatho Group at the Lizard Front (Cornwall): palaeogeographical and geodynamical implications...from the Gramscatho Group at the Lizard Front (Cornwall): palaeogeographical and geodynamical implications...palaeogeographical evolution pattern of the Devon ian of this Cornwall area. B . Le Gall, Laboratoire de Geologie Structurale...of the Lizard basic-ultrabasic Complex (South Cornwall) there outcrops in the Meneage and Roseland zones...the olde st autochthonous sediments of the south Cornwall domain. This stratified formation , terrigenous |  | | Report (chapter) | | of the Rheic–Rhenohercynian suture zone in SW England, the English Channel and Western Approaches ANDREW...Hill of Rubislaw, Anderson Drive, Aberdeen AB15 6B, UK 2 Camborne School of Mines, College of Engineering...Penryn TR10 9FE, UK 3 8 Orchard Way, Willand Old Village, Cullompton EX15 2SG, UK *Correspondence:...plate convergence around SW England and the adjacent offshore areas. SW England occupied a lower plate position...Variscan Rhenohercynian Zone, offshore from SW England (e.g. Holder & Leveridge 1986b; Franke 2000; Nance |  | | Report (chapter) | | Thrust nappe tectonics in the Devonian of south Cornwall and the western English Channel B. E. Leveridge...SUMMARY: A review of stratigraphical data from south Cornwall, considered in conjunction with information obtained...significant role in the geological evolution of south Cornwall, and particularly that the Lizard complex is allochthonous...authors here propose a tectonic model for south Cornwall that is in accord with palaeontological data and...the crux of stratigraphical problems in south Cornwall. It comprises dark grey slates that include dispersed |  | | Journal (article/letter/editorial) | | March 15th, Igl3 310 Excursion to the Lizard, Cornwall, March soth to 2gth, Easter, IgI3 313 Excursion...of the Lizard and St. Keverne. y. S. Flell 33A.-Loe Bar. near Helston, T. C. Halt, photo ... 33B.-Gillan...43B.-Contorted banded Mylor Beds with quartz veining. Porthleven. T. W. Readtr, photo HA.-Epidiorite Dyke |  | | Book | | Collectors Guide to ^MINERALS, ROCKS and GEMSTONES \in Cornwall and Devon |'; '’i '■-■ ,, t Cedric Rogers...Collector’s Guide to MINERALS, ROCKS AND GEMSTONES in Cornwall and Devon Cedric Rogers i D. BRADFORD BARTON...Truro LTD MINERALISED ILPMACOMar AREAS of CORNWALL & DEVON Main. Concentrations of mints. (has...Cleavage and Fracture 8 8 9 10 11 GEMSTONES OF CORNWALL Quartz Gemstones 12 13 GRANITE AND OTHER ROCKS Felspar...Mount’s Bay - The Lizard .. North and Central Cornwall East Cornwall Devon 26 27 28 29 30 31 32 33 34 35 MAPS |  | | Book | | GEOLOGY OF ,,, ,,. F .. THE GEOLOGY OF CORNWALL Cornwall is renowned for its spectacular rocky coastline...seventeenth century. This book reviews the importance of Cornwall in the development of geological thought in Britain...of notable scientific interest. The Geology of· Cornwall is a companion volume to The Geology of Devon...org/details/geologyofcornwal0000unse THE GEOLOGY OF CORNWALL AND THE ISLES OF SCILLY Edited by E.B. Selwood...Liskeard High: E.B. Se/wood The Structure of East Cornwall: K. P Isaac Culn1 Basin: JR. Andrews The Boscastle-Tintagel- |  | | Journal (article/letter/editorial) | | Sligo District ... I7A. -Quartzose Granite vein in Quartz-schist, Dalradian, near Keel, Achill Island. J...of the Lizard and St. Keverne. y. S. Flett 33A.-Loe Bar. near Helstan. T. C. Hall, photo 33B.-Gillan Creek...Porthallow. T. C. Hall, photo 35B.-Giants' Rock, Porthleven, near Helston. T. C. Hall, photo 36.-Map of the...43B.-Contorted banded Mylor Beds with quartz veining. Porthleven. T. W. Reader, photo HA.-Epidiorite Dyke |  | | Journal (volume) | | N TRA comer , OP THE Royal Geological Society CORNWALL . INSTITUTED FEBRUARY 11th , 1814. VOLUME THE...and Zirkel on Crystalline Rocks Stratigraphy of Cornwall Geological Time The Evolution Hypothesis . ...Position and Relations of the Sedimentary Rocks Cornwall . . 12 . • Changes of Level on the Cornish Coasts...Henwood's Works . ix . M .Moissenet on the Lodes of Cornwall Elie de Beaumont's Theories ix . xiv . Report...Fossils of Oornwall . xvii. xviii. TheGeology of Cornwall Mr. Juke's Views thereon xx. xxiv. Dr. Holl on |
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