Search Results for "the-variscan-fold-belt-in-the-british-isles"

Some Aspects of the Variscan Fold Belt

Some Aspects of the Variscan Fold Belt

Ten Lectures Delivered to the Ninth Inter-University Geological Congress

  • Author: Kenneth Coe
  • Publisher: Manchester University Press
  • ISBN: N.A
  • Category: Folds (Geology)
  • Page: 163
  • View: 7526
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New Perspectives on the Old Red Sandstone

New Perspectives on the Old Red Sandstone

  • Author: P. F. Friend
  • Publisher: Geological Society of London
  • ISBN: 9781862390713
  • Category: Science
  • Page: 623
  • View: 3657
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The Variscan Fold Belt in the British Isles,

The Variscan Fold Belt in the British Isles,

  • Author: HANCOCK
  • Publisher: CRC Press
  • ISBN: N.A
  • Category: Science
  • Page: 217
  • View: 1515
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Igneous Rocks of South-West England

Igneous Rocks of South-West England

  • Author: P.A. Floyd,C.S. Exley,M.T. Styles
  • Publisher: Springer Science & Business Media
  • ISBN: 9780412488504
  • Category: Science
  • Page: 256
  • View: 934
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This volume illustrates some of the significant aspects of magmatic activity from Devonian (408 million years ago) to early Permian (270 million years ago) times in SW England. This period covers the progressive development of the Variscan mountain-building episode, from initial basin formation to final deformation and the subsequent development of a fold mountain belt - the Variscan Orogen. Both extrusive (volcanic) and intrusive (plutonic) rocks are found in the orogen, and chart the various stages of its magmatic development. The sites described in this volume are key localities selected for conservation because they are representative of the magmatic history of the orogen from initiation to stabilization. Some of the earliest volcanic activity in the Devonian is represented by submarine basaltic and rhyolitic lavas developed in subsiding basins, caused by the attenuation of the existing continental crust. In some cases, extensive rifting and attendant magmatism produced narrow zones of true oceanic crust, whereas elsewhere basaltic volcanism is related to fractures in the continental crust at the margins of the basins. After the filling of the sedimentary basins, and their deformation caused by crustal shortening (late Carboniferous Period), further activity is manifested by the emplacement of the Cornubian granites and later minor basaltic volcanism in the early Permian. Accounts of the constituent parts of this history have enriched geological literature from the nineteenth century onwards, and have contributed to the advancement and understanding of magmatic and tectonic processes.

Triassic-Jurassic Rifting

Triassic-Jurassic Rifting

Continental Breakup and the Origin of the Atlantic Ocean and Passive Margins

  • Author: W. Manspeizer
  • Publisher: Elsevier
  • ISBN: 148329417X
  • Category: Science
  • Page: 1018
  • View: 3493
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Extensive field studies on the African and North American plates during this past decade have yielded a wealth of new data and ideas about rift basins and the origin of passive margins. New surface and subsurface basins have been identified; fossils abound in strata that only recently were considered barren; oil exploration is being actively pursued in continental strata of the Richmond-Taylorsville, Sanford and Newark basins, Late Triassic marine strata have been identified in Georges Bank off the coast of Massachusetts, and the roles of wrench tectonics, successor basins and listric normal faults have challenged the classical view that these are simple extensional basins. This two part work brings together representative examples of these studies. It is not intended as an exhaustive synthesis of the subject, but rather a vehicle to present new data, new ideas and alternative views. Some of the papers present regional summaries, others attempt to relate local features to regional questions, while others describe modern rift basins as possible analogs of early Mesozoic basins. Geologic data from the Atlantic passive margins record that continental rifting of central Pangaea occurred during the latest Triassic-earliest Jurassic (Liassic), and that sea-floor spreading probably began no later than the Middle Jurassic. The primary subject of this book focuses on the Triassic-Jurassic rifting events that led to the breakup of Pangaea and the opening of the central Atlantic Ocean. Whereas other treatises have focused on the origin of the passive margins, inferred primarily from geophysical data of the offshore basins, this volume primarily and uniquely focuses on land-based field studies of the onshore synrift basins. Offshore studies of synrift basins are also included and add substantially to our understanding of the breakup. However, the onshore data base, while complementary, is different, thus providing researchers with a different insight to the questions at hand. The book is organized into four sections. Section I, Pangaean Plate in Time and Space, first locates Pangaea in space and then places the Triassic basins within an historical context on the Alleghanian-Variscan Orogens. Section 2, the offshore and onshore basins of the North American and African Plates, comprises about 70% of all papers in this book, and includes papers on structural geology, petrology, paleontology, sedimentation, organic geochemistry, vulcanism and mineral resources. Section 3, Related Mesozoic Atlantic Rift Basins, includes papers on Iberia, Western Europe, the Benue Trough and Brazil. The final section of the book, Analogs, includes the rift basins of East Africa, the Red Sea, the Gulf of Elat (Aqaba), the Dead Sea and the Rio Grande. The book is richly illustrated throughout with figures, photographs, tables and fold-out maps, including nine in full colour.

Geological History of Britain and Ireland

Geological History of Britain and Ireland

  • Author: Nigel H. Woodcock,R. A. Strachan
  • Publisher: John Wiley & Sons
  • ISBN: 1444311603
  • Category: Science
  • Page: 432
  • View: 5316
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Britain, Ireland and their surrounding areas have a remarkablyvaried geology for so small a fragment of continental crust. Thisregion contains a fine rock record from all the geological periodsfrom Quaternary back to Cambrian, and a less continuous but stillimpressive catalogue of events back through nearly 2500 millionyears of Precambrian time. This protracted geological history wouldhave been interesting enough to reconstruct if it had been playedout on relatively stable continental crust. However, Britain andIreland have developed instead at a tectonic crossroads, on crusttraversed intermittently by subduction zones and volcanic arcs,continental rifts and mountain belts. The resulting complexitymakes the geological history of this region at once fascinating andperplexing. Geological History of Britain and Ireland tells thegeological story of the region at a level accessible toundergraduate geologists, as well as to postgraduates,professionals or informed amateurs. The book takes amulti-disciplinary rather than a purely stratigraphical approach,and aims to bring to life the processes behind the catalogue ofhistorical events. Full coverage is given to the rich Precambrianand Early Palaeozoic history, as well as to later events morerelevant to hydrocarbon exploration. The book is profuselyillustrated and contains guides to further reading and fullreferences to data sources, making it an essential starting pointfor more detailed studies of the regional geology. All British Earth science undergraduates will be required tospend some time studying British Geological History, and this bookwill be the only one available to British undergraduates The book takes a process-based approach, rather than simplydescribing the regional stratigraphy Lavishly illustrated with high-quality diagrams

Hydrothermal Mineral Deposits

Hydrothermal Mineral Deposits

Principles and Fundamental Concepts for the Exploration Geologist

  • Author: Franco Pirajno
  • Publisher: Springer Science & Business Media
  • ISBN: 3642756719
  • Category: Science
  • Page: 709
  • View: 1945
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This book is intended primarily for exploration geologists and post graduate students attending specialist courses in mineral exploration. Exploration geologists are engaged not only in the search for new mineral deposits, but also in the extension and re-assessment of existing ones. To succeed in these tasks, the exploration geologist is required to be a "generalist" of the Earth sciences rather than a specialist. The exploration geologist needs to be familiar with most aspects of the geology of ore deposits, and detailed knowledge as well as experience play an all important role in the successful exploration for mineral commodities. In order to achieve this, it is essential that the exploration geologist be up to date with the latest developments in the evolution of concepts and ideas in the Earth sciences. This is no easy task, as thousands of publications appear every year in an ever increasing number of journals, periodicals and books. For this reason it is also difficult, at times, to locate appropriate references on a particular mineral deposit type, although this problem is alleviated by the existence of large bibliographic data bases of geological records, abstracts and papers on computers. During my teaching to explorationists and, indeed, during my years of work as an explorationist, the necessity of having a text dealing with the fundamental aspects of hydrothermal mineral deposits has always been compelling. Metallic mineral deposits can be categorised into three great families, namely: (I) magmatic; (2) sedimentary and residual; (3) hydrothermal.

The Structure of Western Europe

The Structure of Western Europe

  • Author: J. G. C. Anderson
  • Publisher: Elsevier
  • ISBN: 1483292975
  • Category: Science
  • Page: 262
  • View: 9424
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After a brief account of the stratigraphy in each case, the author summarises the structure of the main tectonic units of Western Europe, the units being defined within the framework of Precambrian, Caledonian, Hercynian and Alpine structures. The work provides accounts of these structural units both for geological study in general and for field visits for advanced school level and research students. A useful complementary volume to 'The Structure of the British Isles' (Anderson and Owen).

Basement Regions

Basement Regions

  • Author: Alain Godard,Jean-Jacques Lagasquie
  • Publisher: Springer Science & Business Media
  • ISBN: 9783540676652
  • Category: Science
  • Page: 306
  • View: 325
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This book will open up a large body of data previously inaccessible or unknown to non-francophone geomorphologists, geologists and geographers. It provides an insight into the regional geomorphology of basement terrains in France and elsewhere which do not belong to the list of benchmark case studies, recurringly explained in mainstream textbooks. The essay style of the nine chapters, the permanent and holistic reference to landscapes of the real world, and the constant shuttle between field and laboratory studies help to remind students that the analysis of the geomorphic landscape is a humbling process of interpretation, requiring the collation of many strands of evidence. This is not always apparent in more linear textbooks on process geomorphology, where topics are dealt with in more detail but also more theoretically.

The Geology and Mapping of Granite Batholiths

The Geology and Mapping of Granite Batholiths

  • Author: John Cobbing
  • Publisher: Springer
  • ISBN: 3540450556
  • Category: Science
  • Page: 141
  • View: 5726
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This book is mainly about the field geology of granites at all scales from that of a single outcrop to plutons and batholiths. All field geologists work initially at the scale of the outcrop, consequently most of the phenomena treated herein are those which are visible at outcrop scale. However, granites typically occur as plutons and batholiths, some of which are so large as to apparently defy any effort at systematic treatment. Having had the opportunity of mapping two very large and very different batholiths, namely the Coastal Batholith of Peru and the tin granites of Southeast Asia, I have found that it is possible to map large batholiths within a relatively short time, so that the geology of the batholith as a whole can be appreciated. Moreover batholiths are one of the most common modes of granite occurrence, so it makes sense to study them at their natural scale. During my working life I have worked with many geologists from underdevel oped countries and this book is mainly to help them in unravelling the geology of their native batholiths. I have been lucky with my friends and colleagues of many nationalities, and I particularly thank Wallace Pitcher, who took me on as an untried apprentice in Peru, and who, by his kindness and example, showed me how to look at granites properly.

Advanced Geography

Advanced Geography

  • Author: Garrett Nagle
  • Publisher: Oxford University Press
  • ISBN: 9780199134076
  • Category: Juvenile Nonfiction
  • Page: 464
  • View: 3042
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Designed to meet the demands of A Level specifications (both AS and A2), Advanced Geography provides authoritative coverage of course requirements in a convenient and cost-effective single volume. Award-winning author and experienced geography teacher Garrett Nagle provides a thorough and detailed treatment of topics through a variety of features.

Science Progress

Science Progress

  • Author: N.A
  • Publisher: N.A
  • ISBN: N.A
  • Category: Science
  • Page: N.A
  • View: 1610
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Economic Mineralogy

Economic Mineralogy

A Practical Guide to the Study of Useful Minerals

  • Author: Thomas Crook
  • Publisher: N.A
  • ISBN: N.A
  • Category: Geology, Economic
  • Page: 492
  • View: 2865
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The Encyclopædia Britannica

The Encyclopædia Britannica

The New Volumes, Constituting, in Combination with the Twenty-nine Volumes of the Eleventh Edition, the Twelfth Edition of that Work, and Also Supplying a New, Distinctive, and Independent Library of Reference Dealing with Events and Developments of the Period 1910 to 1921 Inclusive

  • Author: N.A
  • Publisher: N.A
  • ISBN: N.A
  • Category: Encyclopedias and dictionaries
  • Page: N.A
  • View: 1975
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The Encyclopaedia Britannica

The Encyclopaedia Britannica

A Dictionary of Arts, Sciences, Literature and General Information

  • Author: N.A
  • Publisher: N.A
  • ISBN: N.A
  • Category:
  • Page: N.A
  • View: 3384
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Encyclopedia Britannica

Encyclopedia Britannica

A Dictionary of Arts, Sciences, Literature and General Information

  • Author: Hugh Chisholm
  • Publisher: N.A
  • ISBN: N.A
  • Category: Encyclopedias and dictionaries
  • Page: N.A
  • View: 9466
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The Geological History of the British Isles

The Geological History of the British Isles

  • Author: Arlëne Hunter,Glynda Easterbrook
  • Publisher: N.A
  • ISBN: 9780749201388
  • Category: Geology
  • Page: 143
  • View: 7950
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Essential reading for first- and second-year Geology undergraduates, A-Level Geology teachers and students and enthusiastic amateur geologists. The book includes a comprehensive glossary, maps and excellent full-colour illustrations, and is based on part of a second-level Open University short course of the same name. The landscape and surface environment of the continental crust that now forms the islands of Great Britain, Ireland and the adjacent lesser isles has undergone dramatic changes during the geological history of the Earth. This book takes the reader on a geological tour of the British Isles, showing how changes in climate, sea-level and relief can be recognized and understood in the geological record. The reader is asked to use a variety of data and geological principles to interpret how and why different rocks formed, and to identify past environments and tectonic settings. By unravelling the geological history of the British Isles, a remarkable insight is gained into the geological evolution of the whole Earth.

The Encyclopaedia Britannica

The Encyclopaedia Britannica

A Dictionary of Arts, Sciences, Literature and General Information

  • Author: Hugh Chisholm
  • Publisher: N.A
  • ISBN: N.A
  • Category: Encyclopedias and dictionaries
  • Page: N.A
  • View: 4373
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Nature

Nature

  • Author: Sir Norman Lockyer
  • Publisher: N.A
  • ISBN: N.A
  • Category: Electronic journals
  • Page: N.A
  • View: 2790
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The Mining Engineer

The Mining Engineer

  • Author: N.A
  • Publisher: N.A
  • ISBN: N.A
  • Category: Mineral industries
  • Page: N.A
  • View: 2487
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