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Pyroclastic density currents are awesome volcanic phenomena that can wreak destruction on a regional scale, and can impact global climate. They deposit ignimbrites, which include vast landscape-modifying sheets with volumes exceeding 1000 km3. This book takes stock of our understanding of pyroclastic density currents, and presents a new conceptual framework for investigating how ignimbrites are deposited. It integrates the results of field-based studies, laboratory experiments and numerical modelling, including work on clastic sedimentology and industrial particle transport. Topics covered include the behaviour of particulate currents, mechanisms of clast support and segregation, interpreting ignimbrite lithofacies and architectures, and future research. The new approach focuses on processes and conditions within the lower flow-boundary zone of a current. Superb diagrams explain many new concepts, while the 95 photographs make an explanatory atlas of deposit types. This is essential reading for workers investigating volcanic hazards, and for anyone wishing to interpret modern or ancient ignimbrites, as well as other catastrophically emplaced sediments. Also available: Statistics in Volcanology - ISBN 1862392080 Physics of Explosive Volcanic Eruptions - Special Publication No 145 - ISBN 978-1-86239-020-1 The Geological Society of LondonFounded in 1807, the Geological Society of London is the oldest geological society in the world, and one of the largest publishers in the Earth sciences.The Society publishes a wide range of high-quality peer-reviewed titles for academics and professionals working in the geosciences, and enjoys an enviable international reputation for the quality of its work.The many areas in which we publish in include:-Petroleum geology-Tectonics, structural geology and geodynamics-Stratigraphy, sedimentology and paleontology-Volcanology, magmatic studies and geochemistry-Remote sensing-History of geology-Regional geology guides
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Pyroclastic density currents and the sedimentation of ignimbrites
Geological Society Memoirs Society Book Editors A. J. FLEET (CHIEF EDITOR) P. DOYLE F. J. GREGORY J. S. GRIFFITHS A. J. HARTLEY R. E. HOLDSWORTH
A. C. MORTON N. S. ROBINS M. S. STOKER J. P. TURNER
Society Publication reviewing procedures The Society makes every effort to ensure that the scientific and production quality of its books matches that of its journals. Since 1997, all book proposals have been refereed by specialist reviewers as well as by the Society's Books Editorial Committee. If the referees identify weaknesses in the proposal, these must be addressed before the proposal is accepted. Once the book is accepted, the Society has a team of Book Editors (listed above) who ensure that the volume editors follow strict guidelines on refereeing and quality control. We insist that individual papers can only be accepted after satisfactory review by two independent referees. The questions on the review forms are similar to those for Journal of the Geological Society. The referees' forms and comments must be available to the Society's Book Editors on request. Although many of the books result from meetings, the editors are expected to commission papers that were not presented at the meeting to ensure that the book provides a balanced coverage of the subject. Being accepted for presentation at the meeting does not guarantee inclusion in the book. Geological Society Publications are included in the ISI Science Citation Index, but they do not have an impact factor, the latter being applicable only to journals. More information about submitting a proposal and producing a Publication can be found on the Society's web site: www.geolsoc.org.uk. It is recommended that reference to all or part of this book should be made in the following way. BRANNEY, M. J. & KOKELAAR, P. 2002. Pyroclastic Den