Download or read book Late Quaternary Paleoenvironmental Changes in Southern Africa and Madagascar written by Lixin Wang and published by . This book was released on 2016 with total page 392 pages. Available in PDF, EPUB and Kindle. Book excerpt: This research reconstructed paleoclimatic and paleoenvironmental conditions using proxy data derived from cave stalagmites, an aeolian sand ramp and fluvial slackwater deposits (SWDs) in Namibia and Madagascar, a broad region influenced by a wide variety of atmospheric and oceanic circulation systems. The stalagmites provided accurately dated high-resolution multiproxy records of Holocene hydroclimate variations in northwest Madagascar and northern Namibia. An 8260-yr stalagmite record for northwest Madagascar documents multiple significant droughts in the Holocene and offers insights into the causes of megafaunal extinctions on the island over the last 2000 years. Three stalagmite records from northern Namibia record climate variations in northwest and northcentral Namibia over the past 4000 years. Comparison of the northern Namibia stalagmite data suggests that there were changes in the influence of Atlantic versus Indian Ocean moisture during the Holocene depending on the dynamics of the Congo Air Boundary. The sedimentology of a sand ramp in the Konkiep valley of southern Namibia, dated by 11 optically stimulated luminescence (OSL) ages, revealed periods of strong winds and great aridity at 49-29 ka and 24-15 ka, and less windy and wetter conditions with fluvial activity at 24-29 ka. Slackwater deposits on the Namibian side of the Orange River, dated by OSL, provided a record of major floods in the lower Orange River at 6.8-8 ka, 5.3-6.5 ka, 3.4-4.6 ka, and 0.5-1.2 ka, indicating increased summer rainfall in the interior of Southern Africa at these times. These records are compared with other published evidence of climate change in southern Africa and Madagascar. The records are also compared with major climate events in the Northern Hemisphere to see how the Southern Hemisphere tropics and subtropics responded to changing conditions in the Northern Hemisphere. The records derived from this research greatly improve our understanding of the late Quaternary paleoclimate of southern Africa and Madagascar, and make important contributions to the southern hemisphere paleoclimate database.

Download or read book Late Quaternary Palaeoenvironments of Southern Africa written by Janette Deacon and published by Oxford University Press, USA. This book was released on 1988 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt: Combining the expertise of an archaeologist and a geologist, this important study gives a balanced evaluation of South African climatic history, summarizing such diverse evidence as dune systems, stable isotopes, pollen, fossil bones, and the distribution of Stone Age people. Together, these factors show the effects of climatic changes on terrestrial ecosystems in the southern African landscape. A comprehensive overview of the nature, scale, and timing of changes coincident with the worldwide interglacial-glacial-interglacial cycle is also presented. The potentials and pitfalls of palaeonenvironmental reconstructions and the implications for biogeography, human population distributions, and palaeoclimatic models are also featured. Researchers in these areas will appreciate this unique and insightful exploration into the climatic history of this fascinating region.

Download or read book Tropical and sub tropical West Africa Marine and continental changes during the Late Quaternary written by P. Giresse and published by Elsevier. This book was released on 2007-11-30 with total page 407 pages. Available in PDF, EPUB and Kindle. Book excerpt: West Africa and the eastern Atlantic stretching from Mauritania in the north to Namibia in the south offer a large latitudinal stretch incorporating nearly symmetrical climatic gradients from the Equator. On the time scale of Quaternary Glacial and Interglacial cycles, today, we possess well-documented and recently published marine sedimentary records showing changes in oceanic and atmospheric circulations and terrestrial fluxes. Deep-sea sediment records contain a wide range of palaeoenvironmental indicators like oxygen and carbon isotopes, alkenones, foraminiferal and other planktonic assemblages over time periods up to and greater than 125,000 years. These are signals of temperature and circulation shifts and allow Interglacial and Glacial comparisons on a regional and inter-hemispheric scale. However, this effort to synthesize the existing knowledge cannot yet aspire to a global modelling. Linking with terrestrial records, albeit spatially patchy and generally lacking a firm chronology, this book points to shorter time scale chronologies from lakes, marshes and river deposits. Diverse and not very wellknown literature, both French and English, is reported here. Lastly, the book records recent knowledge of the first steps of human occupation of frequently hostile environments and considers the environmental impact of ancient and modern societies. * Covers the recent studies about marine Quaternary environments off West Africa, as well as continental Quaternary environments of tropical and sub-tropical West Africa (over 10,000 to 100,000 years)* Compares the parallel between palae-oenvironmental trends according to latitudinal gradients

Download or read book Late Quaternary Environmental Change in Central Southern Africa with Particular Reference to Extensions of the Arid Zone written by David S. G. Thomas and published by . This book was released on 1984 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Quaternary Environmental Change in Southern Africa written by Jasper Knight and published by Cambridge University Press. This book was released on 2016-06-23 with total page 465 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ongoing climate change necessitates advances in our understanding of the interrelationships between climate, landscape-shaping processes and human activity over long time periods, especially in areas that are already climatically stressed. This volume presents new ideas on macroscale landscape evolution; mountain, fluvial and aeolian processes; and environments in southern Africa, a key region in the story of human evolution during the last two million years. Interdisciplinary in scope, it brings together an international team of experts to synthesise the latest research and understanding of landscape-human relationships in this region. It incorporates results from the emerging fields of geoarchaeology and cultural landscapes and utilises the latest data and analytical techniques. A key reference for researchers studying hominid evolution, geoarchaeology and environmental change, it provides a benchmark study of southern African landscape evolution during the Quaternary. It will also appeal to professionals and policymakers with interests in future human-landscape evolution in southern Africa.

Download or read book Late Quaternary Environmental Change in Central Southern Africa with Particular Reference to Extensions of the Arid Zone written by David S. G. Thomas and published by . This book was released on 1984 with total page 1120 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Africa from MIS 6 2 written by Sacha C. Jones and published by Springer. This book was released on 2016-03-04 with total page 419 pages. Available in PDF, EPUB and Kindle. Book excerpt: Bringing together archaeological, paleoenvironmental, paleontological and genetic data, this book makes a first attempt to reconstruct African population histories from out species' evolution to the Holocene. Africa during Marine Isotope Stages (MIS) 6 to 2 (~190-12,000 years ago) witnessed the biological development and behavioral florescence of our species. Modern human population dynamics, which involved multiple population expansions, dispersals, contractions and extinctions, played a central role in our species’ evolutionary trajectory. So far, the demographic processes – modern human population sizes, distributions and movements – that occurred within Africa during this critical period have been consistently under-addressed. The authors of this volume aim at (1) examining the impact of this glacial-interglacial- glacial cycle on human group sizes, movements and distributions throughout Africa; (2) investigating the macro- and micro-evolutionary processes underpinning our species’ anatomical and behavioral evolution; and (3) setting an agenda whereby Africa can benefit from, and eventually contribute to, the increasingly sophisticated theoretical and methodological palaeodemographic frameworks developed on other continents.

Download or read book Quaternary Environments in the Arid Zone of Southern Africa written by I. N. Lancaster and published by . This book was released on 1979 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Research Strategies and Methods for Quaternary Science written by David S. G. Thomas and published by . This book was released on 1987 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Late Quaternary Climatic Changes in Africa written by and published by . This book was released on 1975* with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Late quaternary climate changes in the Horn of Africa written by M. Umer and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Late Quaternary Paleoenvironments and Faunal Exploitation in East Africa written by Curtis William Marean and published by . This book was released on 1990 with total page 576 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The evolution of late Quaternary palaeoclimates of Southern Africa written by E.M. van ZINDEREN BAKKER and published by . This book was released on 1976 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Multi proxy Reconstructions of Late Quaternary Environments in Western Southern Africa written by Abigail Stone and published by . This book was released on 2009 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Multi proxy Reconstructions of Late Quaternary Environments in Western Southern Africa written by Abigail Stone and published by . This book was released on 2009 with total page 436 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Late Quaternary Climatic Change in Africa written by and published by . This book was released on 1975 with total page 280 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Prehistoric Cultures and Environments in the Late Quaternary of Africa written by John Bower and published by British Archaeological Reports Limited. This book was released on 1988 with total page 235 pages. Available in PDF, EPUB and Kindle. Book excerpt: Twelve papers considering cultural responses to long-term environmental change in all parts of Africa (North Africa, the Nile Valley, the Sahara, Sudan, East Africa, the Congo Basin and Southern Africa)