Michael Brown Curriculum Vitae (1 June 2021)
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Vol 8, Issue 2, June 2009
mag30.qxd 05/05/2009 17:46 Page 1 MAGAZINE OF THE GEOLOGISTS’ ASSOCIATION Volume 8 No. 2 June 2009 Appeal for the Archives WSGS Study Tour of Guernsey Meetings July/October ROCKWATCH News Awards Proceedings of the GA Bernard Leake Retires Getting the most from the PGA Dates for your Diary Presidential Address/Lecture Reports GA Trip to Chafford Hundred Book Reviews CIRCULAR 979 mag30.qxd 05/05/2009 17:45 Page 2 Magazine of the Geologists’ Association From the President Volume 8 No.2, 2009 In writing the June presidential report, I am reminded of the vital role that the GA Published by the plays in upholding the importance of geology on a range of scales, from local Geologists’ Association. to international. For example, the GA can serve as a point of contact to provide Four issues per year. CONTENTS critical information on key geological ISSN 1476-7600 sequences that are under threat from 3. The Association insensitive development plans - in short, Production team: JOHN CROCKER, acting as an expert witness. This does Paula Carey, John Cosgrove, New GA Awards not necessarily entail opposing develop- Vanessa Harley, Bill French 4. GA Meetings July/October ment but rather looking for opportunities to enhance geological resources for 5. Awards Printed by City Print, Milton Keynes future study while ensuring that they are 6. Bernard Leake Retires appropriately protected. In addition, a major part of our national earth heritage The GEOLOGISTS’ ASSOCIATION 7. Dates for your Diary is preserved within our museums and in does not accept any responsibility for 8. -
Lithics, Landscape and People: Life Beyond the Monuments in Prehistoric Guernsey
UNIVERSITY OF SOUTHAMPTON FACULTY OF HUMANITIES Department of Archaeology Lithics, Landscape and People: Life Beyond the Monuments in Prehistoric Guernsey by Donovan William Hawley Thesis for the degree of Doctor of Philosophy April 2017 UNIVERSITY OF SOUTHAMPTON ABSTRACT FACULTY OF HUMANITIES Archaeology Thesis for the degree of Doctor of Philosophy Lithics, Landscape and People: Life Beyond the Monuments in Prehistoric Guernsey Donovan William Hawley Although prehistoric megalithic monuments dominate the landscape of Guernsey, these have yielded little information concerning the Mesolithic, Neolithic and Early Bronze Age communities who inhabited the island in a broader landscape and maritime context. For this thesis it was therefore considered timely to explore the alternative material culture resource of worked flint and stone archived in the Guernsey museum. Largely ignored in previous archaeological narratives on the island or considered as unreliable data, the argument made in this thesis is for lithics being an ideal resource that, when correctly interrogated, can inform us of past people’s actions in the landscape. In order to maximise the amount of obtainable data, the lithics were subjected to a wide ranging multi-method approach encompassing all stages of the châine opératoire from material acquisition to discard, along with a consideration of the landscape context from which the material was recovered. The methodology also incorporated the extensive corpus of lithic knowledge that has been built up on the adjacent French mainland, a resource largely passed over in previous Channel Island research. By employing this approach, previously unknown patterns of human occupation and activity on the island, and the extent and temporality of maritime connectivity between Guernsey and mainland areas has been revealed. -
Transactions Lists.Xls
La Société Guernesiaise Papers appearing in the Transactions In chronological order For author order or subject order click on tab at bottom of page. Annual Section reports are not included. Complete printed indexes covering the years 1882 to 1980 can be purchased from the office of La Société. Many issues of the Transactions and reprints of papers are also available for purchase. Decade: 1880 1890 1900 1910 1920 1930 1940 1950 1960 1970 1980 1990 2000 2010 YEAR PAGE VOL PART TITLE AUTHOR 1882-1889 35 I 1 The geology of Guernsey Hill, E 1882-1889 45 I 1 The ferns of Guernsey Derrick, G T 1882-1889 61 I 1 The butterflies of Guernsey and Sark Luff, W A 1882-1889 74 I 1 On the occurrence of calcite in Guernsey Collenette, A 1882-1889 78 I 1 An excursion to Icart Point Derrick, G T 1882-1889 83 I 1 On changes in the relative level of sea and land Derrick, G T 1882-1889 89 I 1 List of flowering plants found in Guernsey Derrick, G T 1889 123 I 2 On the Genus Isoetes Marquand, E D 1889 128 I 2 Excursion to Herm Derrick, G T 1889 133 I 2 The Flora of Herm Marquand, E D 1889 139 I 2 History of Herm Lee, G E 1889 143 I 2 Excursion to Lihou Randell, J B 1889 148 I 2 Crustacea Sinel, J The Nocturnal Macro-Lepidoptera of Guernsey, Alderney, 1889 155 I 2 Luff, W A Sark, and Herm Return to top YEAR PAGE VOL PART TITLE AUTHOR On the correlation and relative ages of the rocks of the 1890 30 II 1 de la Mare, C G Channel Islands 1890 37 II 1 A dredging excursion off Guernsey Spencer, R L 1890 41 II 1 Some notable oral equipments in the vertebrata Rose, -
World Map Showing Surface and Subsurface Distribution, and Lithologic Character of Middle and Late Neoproterozoic Rocks
World Map Showing Surface and Subsurface Distribution, and Lithologic Character of Middle and Late Neoproterozoic Rocks By John H. Stewart1 Open-File Report 2007-1087 2007 U.S. Department of the Interior U.S. Geological Survey 1 Menlo Park, Calif. U.S. Department of the Interior DIRK KEMPTHORNE, Secretary U.S. Geological Survey Mark D. Myers, Director U.S. Geological Survey, Reston, Virginia 2007 Revised and reprinted: 2007 For product and ordering information: World Wide Web: http://www.usgs.gov/pubprod Telephone: 1-888-ASK-USGS For more information on the USGS—the Federal source for science about the Earth, its natural and living resources, natural hazards, and the environment: World Wide Web: http://www.usgs.gov Telephone: 1-888-ASK-USGS Suggested citation: Stewart, John H., 2007, World map showing surface and subsurface distribution, and lithologic character of Middle and Late Neoproterozoic rocks: U.S. Geological Survey Open-File Report 2007-1087. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. Although this report is in the public domain, permission must be secured from the individual copyright owners to reproduce any copyrighted material contained within this report. ii Contents Introduction......................................................................................................................... 3 Sources of information ........................................................................................................ 2 Africa [AF] -
Pan-African Orogeny 1
Encyclopedia 0f Geology (2004), vol. 1, Elsevier, Amsterdam AFRICA/Pan-African Orogeny 1 Contents Pan-African Orogeny North African Phanerozoic Rift Valley Within the Pan-African domains, two broad types of Pan-African Orogeny orogenic or mobile belts can be distinguished. One type consists predominantly of Neoproterozoic supracrustal and magmatic assemblages, many of juvenile (mantle- A Kröner, Universität Mainz, Mainz, Germany R J Stern, University of Texas-Dallas, Richardson derived) origin, with structural and metamorphic his- TX, USA tories that are similar to those in Phanerozoic collision and accretion belts. These belts expose upper to middle O 2005, Elsevier Ltd. All Rights Reserved. crustal levels and contain diagnostic features such as ophiolites, subduction- or collision-related granitoids, lntroduction island-arc or passive continental margin assemblages as well as exotic terranes that permit reconstruction of The term 'Pan-African' was coined by WQ Kennedy in their evolution in Phanerozoic-style plate tectonic scen- 1964 on the basis of an assessment of available Rb-Sr arios. Such belts include the Arabian-Nubian shield of and K-Ar ages in Africa. The Pan-African was inter- Arabia and north-east Africa (Figure 2), the Damara- preted as a tectono-thermal event, some 500 Ma ago, Kaoko-Gariep Belt and Lufilian Arc of south-central during which a number of mobile belts formed, sur- and south-western Africa, the West Congo Belt of rounding older cratons. The concept was then extended Angola and Congo Republic, the Trans-Sahara Belt of to the Gondwana continents (Figure 1) although West Africa, and the Rokelide and Mauretanian belts regional names were proposed such as Brasiliano along the western Part of the West African Craton for South America, Adelaidean for Australia, and (Figure 1). -
Magmatic Enclaves and Evidence for Magma Mixing in the Oak Point Granite, Deer Isle, Maine, USA Ben Johnston
The University of Maine DigitalCommons@UMaine Electronic Theses and Dissertations Fogler Library 12-2001 Magmatic Enclaves and Evidence for Magma Mixing in the Oak Point Granite, Deer Isle, Maine, USA Ben Johnston Follow this and additional works at: http://digitalcommons.library.umaine.edu/etd Part of the Geology Commons, and the Tectonics and Structure Commons Recommended Citation Johnston, Ben, "Magmatic Enclaves and Evidence for Magma Mixing in the Oak Point Granite, Deer Isle, Maine, USA" (2001). Electronic Theses and Dissertations. 603. http://digitalcommons.library.umaine.edu/etd/603 This Open-Access Thesis is brought to you for free and open access by DigitalCommons@UMaine. It has been accepted for inclusion in Electronic Theses and Dissertations by an authorized administrator of DigitalCommons@UMaine. MAGMATIC ENCLAVES AND EVIDENCE FOR MAGMA MIXING IN THE OAK POINT GRANITE, DEER ISLE, MAINE, U.S.A. BY Ben Johnston B.S. University of Cincinnati, 1998 A THESIS Submitted in Partial Fulfillment of the Requirements for the Degree of Master of Science (in Geological Sciences) The Graduate School The University of Maine December, 200 1 Advisory Committee: Daniel R. Lux, Professor of Geological Sciences, Advisor David Gibson, Professor of Geological Sciences, University of Maine at Fannington Martin G. Yates, Associate Scientist, Geological Sciences MAGMATIC ENCLAVES AND EVIDENCE FOR MAGMA MIXING IN THE OAK POINT GRANITE, DEER ISLE, MAINE, U.S.A. By Ben Johnston Thesis Advisor: Dr. Daniel R. Lux An Abstract of the Thesis Presented in Partial Fulfillment of the Requirements for the Degree of Master of Science (in Geological Sciences) December, 200 1 The Coastal Maine Magmatic Province (CMMP) consists of over 100 post tectonic plutons with ages varying from Silurian to Carboniferous. -
Proceedings of the Ussher Society
Proceedings of the Ussher Society Research into the geology and geomorphology of south-west England Volume 6 Part 3 1986 Edited by G.M Power The Ussher Society Objects: To promote research into the geology and geomorphology of south- west England and the surrounding marine areas; to hold Annual Conferences at various places in South West England where those engaged in this research can meet formally to hear original contributions and progress reports and informally to effect personal contacts; to publish, proceedings of such Conferences or any other work which the Officers of the Society may deem suitable. Officers: Chairman Dr. C.T. Scrutton Vice-Chairman Dr. E. B. Selwood Secretary Mr M.C. George Treasurer Mr R.C. Scrivener Editor Dr. G.M. Power Committee Members Dr G. Warrington Mr. C. R. Morey Mr. C.D.N. Tubb Mr. C. Cornford Mr D. Tucker Membership of the Ussher Society is open to all on written application to the Secretary and payment of the subscription due on January lst each year. Back numbers may be purchased from the Secretary to whom correspondence should be directed at the following address: Mr M. C. George, Department of Geology, University of Exeter, North Park Road, Exeter, Devon EX4 4QE Proceedings of the Ussher Society Volume 6 Part 3 1986 Edited by G.M. Power Crediton, 1986 © Ussher Society ISSN 0566-3954 1986 Typeset, printed and bound bv Phillips & Co., The Kyrtonia Press, 115 High Street, Crediton, Devon EXl73LG Set in Baskerville and Printed by Photolithography Proceedings of the Ussher Society Volume 6, Part 3, 1986 Papers D.L. -
Precambrian in the External Zones of the Variscides: Central and Northern Parts O F the Armprican Massif
Chapter 1 Precambrian in the external zones of the Variscides: central and northern parts o f the Armprican Massif Jean Cogné,* Bernard auvray,* Lionel dupretv Jean-Jacques Chauvel,* and Dominique Rabu* * Centre Armoricain d ’Etude Structurale des Socles (CNRS), Institut de Géologie de l’Université de Rennes, 35042 Rennes-Cedex ’Laboratoire de Géologie Armoricaine, Université de Caen, 14032 Caen-Cedex 'B.R.G.M., Service Géologique Régional ‘Pays de Loire’, 10, Rue H. Picherit, 44300 Nantes Contents General framework J. Cogné 414 1.1 Precambrian in the Domnonean domain: the Trégor Massif of north Brittany B. Auvray 415 References 433 1.2 Problem of the Lower Brioverian in the context of a two-phase Cadomian orogenic cycle: the Precambrian of the Penthièvre Massif and its adjoining Mancellian boundary J. Cogné 434 References 443 1.3 The Proterozoic of northeastern Armorican Massif L. Dupret 444 References 460 1.4 Brioverian in central Brittany J.-J. Chauvel and D. Rabu 462 References 470 1.5 Geodynamic evolution of the Cadomian fold belt in the Armorican Massif: present data and new problems J. Cogné 470 References 482 413 Precambrian in the external zones o f the Variscides 415 Cadomian tectonic effects appear relatively minor defined in this massif (Cogné, 1959) and even if the and are seen to diminish in importance as one goes existence of an ancient basement is very likely, there towards the south and east away from the is no evidence so far for rocks older than 1000 Ma. Domnonean ‘Cordillera’ (ridge). The deformation This is in contrast with the situation further north style of these external parts of the Cadomian chain in the Trégor massif and in the Channel Islands is characterized by a lack of cleavage and a (Fig. -
00-P. P.Ginas + Editorial
Estudios Atacameños Nº 16 - 1998 La tradición surandina del desierto: Etnobotánica del área del Salar de Atacama (Provincia de El Loa, Región de Antofagasta, Chile)1 CAROLINA VILLAGRÁN*, VICTORIA CASTRO**, GILBERTO SÁNCHEZ***, MARCELA ROMO**, CLAUDIO LATORRE** y LUIS FELIPE HINOJOSA** RESUMEN El área del Salar de Atacama, Provincia de El Loa, to de las plantas en los territorios de estas culturas segunda Región de Antofagasta del norte de Chi- y definir sus singularidades etnobotánicas, en co- le, es una de las más secas del mundo, correspon- rrespondencia con su situación tan especial den- diendo al área de máxima penetración del Desier- tro de los Andes del norte de Chile. Con este pro- to de Atacama en la costa Pacífica de Sudamérica. pósito, se realizó una recolección exhaustiva de la En efecto, y en concordancia con la disminución flora del área y un muestreo sistemático de la ve- de las lluvias en sentido NW-SE, desde los Andes getación, este último siguiendo un transecto de Arica (18°S), hacia los de Antofagasta (24°S), altitudinal desde el Salar de Atacama (2.700 m) se observa que la vegetación se retrae paulatina- hasta el Salar de Aguas Calientes (4.500 m). Pos- mente hacia mayores altitudes. Así, extensas áreas teriormente, se entrevistaron 38 personas prove- al interior de la ciudad de Calama, representadas nientes de San Pedro de Atacama, Toconao, por el Salar de Atacama, Cordillera de Domeyko Talabre, Camar, Socaire y Peine. y sectores bajos de la vertiente occidental andina corresponden a desiertos ‘absolutos’, con valores Para las 173 especies de plantas consultadas se de coberturas de plantas vasculares prácticamen- registraron 416 nombres vernaculares, correspon- te nulos. -
Structure and Tectonic Evolution of the Armorican Massif
Downloaded from http://jgs.lyellcollection.org/ by guest on September 25, 2021 J. geol. Soc. London, Vol. 137, 1980, pp. 211-216. Printed in Northern Ireland. Conference Report Structure and tectonic evolution of the Armorican Massif R. A. Roach Report of a meeting of the Tectonic Studies Group held onthe foliated granodiorites and quartz-diorites, to at Burlington House, 14 March 1979. The meeting was helpdistinguishto Pentevrian andCadomian organized by Dr A. J. Barber and Dr P. R. Cobbold. magmatic-metamorphic episodes. Whiledeformation, metamorphic and magmatic The papers presented provided a timely review of the episodes occurring between 670 and 490 Ma are well major advances during the last decade in understand- establishedfor the northern part of theMassif, the ing the structure and tectonic evolutionof the Armori- significance of Cadomian structures in central Brittany canMassif. The establishment of specialresearch has been recently questioned. According to Hanmer, groups at the Universities of Rennes, Brest, Caen and Le Corre & Bertht,who presented a considerable Nantes, supported by the CNRS, has been the prime amount of supporting data, the main syn-metamorphic factor in this development. As a result, the geological deformation recognized within the Upper Brioverian evolution of this region is probably better understood of central Brittany is Hercynian in age. Less certain, thanthat of otherNercynian Massifs in central and however, is their conclusion that the Upper Brioverian western Europe. is thepost-tectonic molasse to the main phases of Thegeological evolution of the Armorican Massif Cadomianorogeny. CognC,in his model,envisaged canbe traced back more than 2000 Ma, beginning deposition of thecentral Brittany Brioverian on the withthe deposition of aLower Proterozoic or late southerncontinental slope of thePentevrian micro- Archaean supracrustal sequence which was polyphase continent, whereas Auvray & Lefort suggested deposi- deformed,metamorphosed, and intruded by granitic tion within a marginal sea. -
Erosion, Transport and Segregation of Pumice and Lithic Clasts in Pyroclastic ¯Ows Inferred from Ignimbrite at Lascar Volcano, Chile
Journal of Volcanology and Geothermal Research 104 (2000) 201±235 www.elsevier.nl/locate/jvolgeores Erosion, transport and segregation of pumice and lithic clasts in pyroclastic ¯ows inferred from ignimbrite at Lascar Volcano, Chile E.S. Caldera,*, R.S.J. Sparksa, M.C. Gardewegb aDepartment of Earth Sciences, University of Bristol, Bristol BS8 1RJ, UK bServicio Nacional de Geologia y Mineria, Avenida Santa Maria 0104, Casilla 10465, Santiago, Chile Received 4 November 1998; revised and accepted 4 May 2000 Abstract Investigations have been made on the distribution of pumice and lithic clasts in the lithic rich Soncor ignimbrite (26.5 ka) and the 1993 pumice ¯ow deposits of Lascar Volcano, Chile. The Soncor ignimbrite shows three main lithofacies which grade into one another. Coarse lithic breccias range from matrix poor strati®ed varieties, irregular shaped sheets and elongate hummocks in proximal environments, to breccia lenses with pumiceous ignimbrite matrix. Massive, lithic rich facies comprise the bulk of the ignimbrite. Pumice rich facies are bimodal with abundant large pumice clasts (often with reverse grading), rare lithic clasts and occur distally and on high ground adjacent to deep proximal valleys. In the 1993 pyroclastic ¯ow deposits lithic rich facies are deposited on slopes up to 148 whereas pumice rich facies are deposited only on slopes ,48. Lithic rich parts show a thin pumice rich corrugated surface which can be traced into the pumice rich facies. The high lithic content in the Soncor ignimbrite is attributed to the destruction of a pre-existing dome complex, deep explosive cratering into the interior of the volcano and erosion during pyroclastic ¯ow emplacement. -
Paleozoic Evolution of Pre-Variscan Terranes: from Gondwana to the Variscan Collision
Geological Society of America Special Paper 364 2002 Paleozoic evolution of pre-Variscan terranes: From Gondwana to the Variscan collision Gérard M. Stamp×i Institut de Géologie et Paléontologie, Université de Lausanne, CH-1015 Lausanne, Switzerland Jürgen F. von Raumer Institut de Minéralogie et Pétrographie, Université de Fribourg, CH-1700 Fribourg, Switzerland Gilles D. Borel Institut de Géologie et Paléontologie, Université de Lausanne, CH-1015 Lausanne, Switzerland ABSTRACT The well-known Variscan basement areas of Europe contain relic terranes with a pre-Variscan evolution testifying to their peri-Gondwanan origin (e.g., relics of Neo- proterozoic volcanic arcs, and subsequent stages of accretionary wedges, backarc rift- ing, and spreading). The evolution of these terranes was guided by the diachronous subduction of the proto-Tethys oceanic ridge under different segments of the Gond- wana margin. This subduction triggered the emplacement of magmatic bodies and the formation of backarc rifts, some of which became major oceanic realms (Rheic, paleo- Tethys). Consequently, the drifting of Avalonia was followed, after the Silurian and a short Ordovician orogenic event, by the drifting of Armorica and Alpine domains, ac- companied by the opening of the paleo-Tethys. The slab rollback of the Rheic ocean is viewed as the major mechanism for the drifting of the European Variscan terranes. This, in turn, generated a large slab pull force responsible for the opening of major rift zones within the passive Eurasian margin. Therefore, the µrst Middle Devonian Variscan orogenic event is viewed as the result of a collision between terranes detached from Gondwana (grouped as the Hun superterrane) and terranes detached from Eurasia.