Download or read book Precambrian Palaeoweathering and Erosion Surfaces in Southern Africa written by A. Button and published by . This book was released on 1979 with total page 74 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Palaeoweathering Palaeosurfaces and Related Continental Deposits written by Medard Thiry and published by John Wiley & Sons. This book was released on 2009-04-29 with total page 408 pages. Available in PDF, EPUB and Kindle. Book excerpt: The study of palaeoweathering provides vital clues about pastcontinental environments, the correlation of sedimentary depositsand processes such as the rate and timing of uplift and erosion. This volume (based partly on research presented at IGCP 317Palaeoweathering Records and Palaeosurfaces) contains contributionsthat use both geochemical and physical approaches to the study ofpalaeoweathering problems. The former are particularly relevant toour understanding of past climates and climate change; the latterhave applications in the understanding of mass balance betweenrates of erosion and deposition. Palaeoweathering, Palaeosurfaces and Related ContinentalDeposits illustrates the multidisciplinary nature of the subject,the diversity of techniques and, above all, the vital contributionthe subject makes to the reconstruction of ancient continentalenvironments. This book will be of great value to sedimentologists,soil scientists and geomorphologists. If you are a member of the International Association ofSedimentologists, for purchasing details, please see:http://www.iasnet.org/publications/details.asp?code=SP27
Download or read book The African Erosion Surface written by Kevin Burke and published by Geological Society of America. This book was released on 2008-01-01 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt: "In this Memoir, Burke and Gunnell draw on anglophone and francophone work to analyze the African continent's distinctive basin-and-swell topography. Exploring topics such as landforms, bauxites and laterites, fission-track studies, climatic changes, volcanic rock distribution, hotspots, mantle plumes, and rifts, as well as deep and shallow mantle geophysics, ocean floor evolution, continental flooding, and offshore sediment deposition, the authors have pieced together a coherent, continent-wide reconstruction of landscape development during the past 200 million years. Two episodes of continental breakup and the formation of ocean floor were followed by erosion that reduced the continent to a low-elevation and low-relief African Surface by Late Cretaceous times. Africa's present-day topography developed mostly during the past 30 million years as the African Surface underwent swell uplift and climate changed radically after the Antarctic ice sheet first formed. Northern hemisphere glaciation and related Sahara initiation 3 million years ago were Africa's most recent great changes."--Publisher's website.
Download or read book Origin and Evolution of Precambrian High grade Gneiss Terranes with Special Emphasis on the Limpopo Complex of Southern Africa written by D. D. Van Reenen and published by Geological Society of America. This book was released on 2011-01-01 with total page 340 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Crustal Evolution of Southern Africa written by A. J. Tankard and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 528 pages. Available in PDF, EPUB and Kindle. Book excerpt: Syntheses of the geology of major areas of the Earth's crust are increasingly needed in order that the features of, and the problems associated with, the secular evolution of the continents can be understood by a wide audience. Southern Africa is fortunate in having a remarkable variety of geological environments developed without many breaks over 3. 8 Ga, and many of the rock groups are household names throughout the geological world. In one respect the geology of Southern Africa is particularly important: cratonization clearly began as early as 3. 0 Ga ago, in contrast to about 2. 5 Ga in most other continental areas such as North America. This book documents very well the remarkable change in tectonic conditions that took place between the Early and Mid-Precambrian; we have here evidence of the very earliest development of rigid lithospheric plates. This book is a tribute to the multitudes of scientists who have worked out the geology of Southern Africa over many years and decades. Whatever their discipline, each provided a step in the construction of this fascinating story of 3. 8 Ga of crustal development. In the book the reader will find a detailed review of the factual data, together with a balanced account of interpretative models without the indulgence of undue speculation. One of its attractions is its multidisciplinary approach which provides a stimulating challenge to the reader.
Download or read book A Revised Precambrian Time Scale for South Africa written by M. R. Johnson and published by . This book was released on 1989 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Principles of Precambrian Geology written by Alan M. Goodwin and published by Elsevier. This book was released on 1996-06-18 with total page 339 pages. Available in PDF, EPUB and Kindle. Book excerpt: Principles of Precambrian Geologyis an update to the 1991 book, Precambrian Geology: The Dynamic Evolution of the Continental Crust, by the same author. The new edition covers the same topics in a more concise and accessible format and is replete with explanatory figures, tables, and illustrations. The book serves as a modern comprehensive statement on the Earth's Precambrian crust, covering the main aspects of distribution, lithiostratigraphy, age, and petrogenesis of Precambrian rocks by continent within the context of the Earth's evolving continental crust. Principles of Precambrian Geology provides a suitable framework for assessing various Earth dynamic and biospheric hypotheses, including the modern plate tectonic paradigm and the Gaian hypothesis. Despite the concise format, the new edition provides extensive updated references to support the information presented. It is designed to serve the needs of student, teacher, explorationist and general student of the continental crust. Updated to provide more concise accessible information Extensive illustrations, tabulations, and maps Provides a framework for assessing recent hypothesis on Earth dynamics Covers main aspects of distribution, lithostratigraphy, age, and protogenesis of Precambrian rocks
Download or read book Climatic Change and Variability in Southern Africa written by P. D. Tyson and published by Oxford University Press, USA. This book was released on 1986 with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book examines the history and mechanisms of climatic change in the southern hemisphere, with emphasis on southern Africa. The crucial question, one which affects the lives of millions, is what determines whether there will be rain or drought. Professor Tyson examines this problem first in the context of geologic history. He then discusses present-day circulation and the manner in which the atmosphere modulates wet and dry spells. He proposes a circulation model to account for paleoclimatic changes over the subcontinent during the last 25 millenia. The material presented here represents research accumulated over a period of 17 years. Nothing similar exists for any country in the southern hemisphere.
Download or read book Transactions of the Geological Society of South Africa written by Geological Society of South Africa and published by . This book was released on 1981 with total page 360 pages. Available in PDF, EPUB and Kindle. Book excerpt: Vols. 1-6, 49-68 include its Proceedings.
Download or read book Precambrian of the Southern Hemisphere written by D.R. Hunter and published by Elsevier. This book was released on 1981-01-01 with total page 890 pages. Available in PDF, EPUB and Kindle. Book excerpt: Precambrian of the Southern Hemisphere
Download or read book South African Journal of Geology written by and published by . This book was released on 1994 with total page 556 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Canadian Journal of Earth Sciences written by and published by . This book was released on 1992 with total page 744 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Precambrian Sedimentary Environments written by Wladyslaw Altermann and published by John Wiley & Sons. This book was released on 2009-03-05 with total page 464 pages. Available in PDF, EPUB and Kindle. Book excerpt: The motivation for this volume came from the idea that thePrecambrian is the key, both to the present, and to theunderstanding of the Earth as a whole. The Precambrian constitutesabout 85% of Earth's history, and of that, about 3.75 billion yearsof Precambrian time, represented by rocks, are accessible togeoscientists. Ancient atmospheric and environmental conditions canbe traced back to the time when the Earth was only about 250million years old. Precambrian rocks supply almost 75% of importantmineral resources such as Fe, Mn, Au, Pt and Cr. Many of theseelements are associated with sedimentary rocks and some importanthydrocarbon, coal and graphite deposits are also hosted byPrecambrian rocks. This volume is aimed at geoscientists interested in Precambriansedimentary rocks and at students of Earth history. It containsreview articles discussing Precambrian conditions and case studiesfrom Precambrian shields and successions of North and SouthAmerica, Australia, Africa, Europe, Asia and India. Theintroductory papers, written by experts on Precambrianenvironments, treat comprehensively the application of actualism tothe Precambrian, the evolution and influence of life on thesedimentary rock record, the genesis of Banded Iron Formations, thePrecambrian sulphur cycle and the significance of Precambrianchemical carbonate precipitates. The case studies includedepositional settings and processes in Archean terranes, inPaleoproterozoic sequences, with some emphasis on the lack ofvegetation and weathering, and in late Proterozoic sequences, withsome emphasis on glacial deposits. The contributions demonstratethat Precambrian sedimentary deposits are commonly similar to theirPhanerozoic counterparts in terms of composition, sedimentaryprocesses, and depositional setting, but may differ significantlyas a result of lack of vegetation, climatic and biologicalconstraints, composition and circulation of seawater, and thesecular involvement of continental crust. Contains review articles discussing Precambrian conditions andcase studies from Precambrian shields and successions of North andSouth America, Australia, Africa, Europe, Asia and India. The introductory papers, written by experts on Precambrianenvironments, treat comprehensively the application of actualism tothe Precambrian, the evolution and influence of life on thesedimentary rock record, the genesis of Banded Iron Formations, thePrecambrian sulphur cycle and the significance of Precambrianchemical carbonate precipitates. Detailed case studies include depositional settings andprocesses in Archean terranes, in Paleoproterozoic sequences, withsome emphasis on the lack of vegetation and weathering, and in lateProterozoic sequences, with some emphasis on glacialdeposits. Written for geoscientists interested in Precambrian sedimentaryrocks and students of Earth history. If you are a member of the International Association ofSedimentologists (IAS), for purchasing details, please see:http://www.iasnet.org/publications/details.asp?code=SP33
Download or read book Late Precambrian Glaciogenic Sedimentary Rocks in Southern Africa written by Alfred Kröner and published by . This book was released on 1972 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Contributions to the Precambrian Geology of Southern Africa written by Alfred Kröner and published by . This book was released on 1974 with total page 213 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Review of Metamorphism in the Republic of South Africa and the Kingdoms of Lesotho and Swaziland written by E. P. Saggerson and published by . This book was released on 1995 with total page 342 pages. Available in PDF, EPUB and Kindle. Book excerpt:
