Download or read book Snowline Altitude and Climate in the Central Andes 5 280S at Present and During the Late Pleistocene Glacial Miximum written by Andrew Norman Fox and published by . This book was released on 1993 with total page 1066 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Snowline Altitude and Climate in the Central Andes 5 28 S at Present and During the Late Pleistocene Glacial Maximum written by Andrew Norman Fox and published by . This book was released on 1993 with total page 527 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Snowline Altitude and Climate in the Central Andes 5 28 S at Present and During the Late Pleistocene Glacial Miximum written by Andrew Norman Fox and published by . This book was released on 1993 with total page 1008 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Glaciations in North and South America from the Miocene to the Last Glacial Maximum written by Nat Rutter and published by Springer Science & Business Media. This book was released on 2012-06-30 with total page 75 pages. Available in PDF, EPUB and Kindle. Book excerpt: Improved dating methods have increased our ability to more precisely determine the timing and durations of glaciations. Utilizing glacial and loess deposits, we have compared glaciations that occurred in North and South America in order to determine if events are synchronous or not, to explore forcing mechanisms, and to compare glaciations with cold periods of the Marine Oxygen Isotope stages and the loess/paleosol records of China. Stratigraphic sections containing a variety of glacial deposits, some with interbedded volcanics, as well as loess deposits, were used in reconstructing the glacial history. The Late Pleistocene (Brunhes Chron) Last Glacial Maximum is recognized in mountain and continental areas of North America but only in the mountains of South America. Commonly our comparisons indicate roughly synchronous glaciations on the two continents, whereas other glaciations are more elusive and difficult to compare. Although our comparisons are at low resolutions, the results suggest that Milankovitch forcing is most likely the dominant trigger for hemispheric glaciation modified by local factors.
Download or read book Origin of Late Pleistocene Paleolakes in the Central Andes written by Troy Alexander Blodgett and published by . This book was released on 1996 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ice Age Southern Andes written by C.J. Heusser and published by Elsevier. This book was released on 2003-11-12 with total page 257 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Southern Andes, stretching from the subtropics to the subantarctic, are ideally located for palaeoenvironmental research. Over the broad and continuous latitudinal extent of the cordillera (-24˚), vegetation is adjusted to climatic gradients and atmospheric circulation patterns. Opposed to the prevailing Southern Westerlies, the Southern Andes are positioned to receive the brunt of the winds, while biota are set to record the shifting of incoming storm systems over time. Sequential, latitudinally-placed, sedimentary deposits containing microfossils and macroremains, as archives of past vegetation and climate, make possible the detection of equatorward and poleward displacement of plant communities and, as a consequence, changes in climatic controls. No terrestrial setting in the Southern Hemisphere is so unique for palaeoenvironmental reconstruction during and since the last ice age. Twenty radiocarbon-dated fossil pollen and spore records chosen to place emphasis on the last ice age include high-resolution, submillennial data sets that also cover the Holocene, thus providing contrast between present interglacial and past glacial ages. From a refined data base, the records constitute the foundation for interpreting factors responsible for vegetation change over >50,000 14C years, glacial-interglacial migration and refugial patterns for a diversity of taxa, and the extent of intrahemispheric and polar hemispheric synchroneity versus asynchroneity.
Download or read book Geography of the Central Andes written by Alan Grant Ogilvie and published by . This book was released on 1922 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Glacial History and Climate Change in the Peruvian Bolivian Andes written by Geoffrey Owen Seltzer and published by . This book was released on 1991 with total page 416 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Modern and Late Pleistocene Glacial Studies in the Central Andes of Peru and Bolivia written by Andrew George Klein and published by . This book was released on 1997 with total page 382 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Eolian Landforms in the Central Andes written by Lesley Lisa Greene and published by . This book was released on 1995 with total page 158 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Late Pleistocene Deglaciation Histories in the Central M rida Andes Venezuela written by Isandra Fortuna Angel Ceballos and published by . This book was released on 2016 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The central Mérida Andes (Venezuela) landscape is characterized by the presence of well-preserved glacial landforms located between 2400 and 4978 m a.s.l. Geomorphological studies of these glacial landforms significantly contribute to the Venezuelan Andes glaciations reconstructions. However, Last Glaciation (locally called Mérida Glaciation) was poorly reconstructed because of limited chronological data. This dissertation attempts to contribute to the Last Glaciation reconstruction and paleoclimate knowledge since the late Pleistocene. Accordance this necessity, the methodology involved geomorphological analysis and geochronological study. Glacial landforms were dated based on the Terrestrial Cosmogenic Nuclide dating (10Be). This method is suitable for date quartz-rich materials and for the period of interest. To deduce paleoclimate conditions an analysis based on paleo ELA was developed.In the central Mérida Andes different Late Pleistocene glacier dynamics were identified. In the Mucubají and the Mucuchache valleys, successive stages of glacier stop-advance were identified during an overall glacier withdrawal. In the Gavidia and Mifafí valleys, glacier withdrawal was rapid with the highest retreat rates (between 4-7 km/ky). Morphometric features as glaciers bottom valley slopes, accumulation zone topography (glaciers cirques with steep walls), areas and orientation controlled different glaciers dynamics.Glacier advances were evidenced between 2500-4200 m. MIS 3 glaciers advances has been recognized in the Sierra Nevada. These were related to the highest runoff in the north of South America produced by the Intertropical Convergence Zone (ITCZ) and the local warm and wet climate conditions (locally named El Pedregal Interstadial). LGM glacier advances were recorded in Sierra Nevada in the Mucubají and Las Tapias between 3100-3600 m. MIS 2 Glaciers advances mainly occurred during the Oldest Dryas- El Caballo Stadial at around 17 ka. These glaciers advances correlate to the cold temperatures in the North Hemisphere and the coldest temperatures recorded in tropical ice cores.KeywordsTerrestrial cosmogenic nuclides dating, TCN, cosmogenic dating, glacial landforms, Andes Mérida, Venezuela. Pleistocene, Last Glaciation, LGM, paleo ELA, tropic paleoclimate.
Download or read book The Problem of the Andean Dry Diagonal written by Bruno Messerli and published by . This book was released on 1998 with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Geography of the Central Andes written by Alan G. Ogilvie and published by . This book was released on 2015-06-28 with total page 298 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from Geography of the Central Andes: A Handbook to Accompany the La Paz Sheet of the Map of Hispanic America on the Millionth Scale About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Download or read book Glacier written by Philippe Wäger and published by . This book was released on 2009 with total page 118 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Holocene Paleohydrology of the Tropical Andes from Lake Records written by and published by . This book was released on 1997 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt: Two century-scale time series in northern Bolivia constrain the ages of abrupt changes in the physical, geochemical, and biological characteristics of sediments obtained from lakes that formed during deglaciation from the late Pleistocene glacial maximum. The watersheds of Laguna Viscachani (16°12'S, 68°07'W, 3780m) and Lago Taypi Chaka Kkota (16°13'S, 68°21'W, 4300m), located on the eastern and western slopes of the Cordillera Real, respectively, contain small cirque glaciers. A high-resolution chronology of the lake sediments is provided by 23 AMS 14C dates of discrete macro-fossils. Late Pleistocene glaciers retreated rapidly, exposing the lake basins between 10,700 and 9700 14C yr B.P. The sedimentary facies suggest that after 8900 14C B.P. glaciers were absent from the watersheds and remained so during the middle Holocene. An increase in the precipitation-evaporation balance is indicated above unconformities dated to about 2300 14C yr B.P. in both Lago Taypi Chaka Kkota and Laguna Viscachani. An abrupt increase in sediment accumulation rated after 1400 14C yr B.P. signals the onset of Neoglaciation. A possible link exists between the observed millennial-scale shifts in the regional precipitation- evaporation balance and seasonal shifts in tropical insolation.
Download or read book Andean Archaeology I written by William H. Isbell and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 420 pages. Available in PDF, EPUB and Kindle. Book excerpt: Study of the origin and development of civilization is of unequaled importance for understanding the cultural processes that create human societies. Is cultural evolution directional and regular across human societies and history, or is it opportunistic and capricious? Do apparent regularities come from the way inves tigators construct and manage knowledge, or are they the result of real constraints on and variations in the actual processes? Can such questions even be answered? We believe so, but not easily. By comparing evolutionary sequences from different world civilizations scholars can judge degrees of similarity and difference and then attempt explanation. Of course, we must be careful to assess the influence that societies of the ancient world had on one another (the issue of pristine versus non-pristine cultural devel opment: see discussion in Fried 1967; Price 1978). The Central Andes were the locus of the only societies to achieve pristine civilization in the southern hemi sphere and only in the Central Andes did non-literate (non-written language) civ ilization develop. It seems clear that Central Andean civilization was independent on any graph of archaic culture change. Scholars have often expressed appreciation of the research opportunities offered by the Central Andes as a testing ground for the study of cultural evolu tion (see, e. g. , Carneiro 1970; Ford and Willey 1949: 5; Kosok 1965: 1-14; Lanning 1967: 2-5).
Download or read book A Prehistory of South America written by Jerry D. Moore and published by University Press of Colorado. This book was released on 2014-07-09 with total page 553 pages. Available in PDF, EPUB and Kindle. Book excerpt: A Prehistory of South America is an overview of the ancient and historic native cultures of the entire continent of South America based on the most recent archaeological investigations. This accessible, clearly written text is designed to engage undergraduate and begining graduate studens in anthropology. For more than 12,000 years, South American cultures ranged from mobile hunters and gatherers to rulers and residents of colossal cities. In the process, native South American societies made advancements in agriculture and economic systems and created great works of art—in pottery, textiles, precious metals, and stone—that still awe the modern eye. Organized in broad chronological periods, A Prehistory of South America explores these diverse human achievements, emphasizing the many adaptations of peoples from a continent-wide perspective. Moore examines the archaeologies of societies across South America, from the arid deserts of the Pacific coast and the frigid Andean highlands to the humid lowlands of the Amazon Basin and the fjords of Patagonia and beyond. Illustrated in full color and suitable for an educated general reader interested in the Precolumbian peoples of South America, A Prehistory of South America is a long overdue addition to the literature on South American archaeology.
