Journal ArticleDOI
14C and Th/U Dating of Pleistocene and Holocene Stromatolites from East African Paleolakes
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In this article, an initial 230Th232Th ratio in the detrital component was determined by ThU measurements on the 14C dated stromatolites, using this value a 230Th234U chronology was calculated.About:
This article is published in Quaternary Research.The article was published on 1986-05-01. It has received 112 citations till now.read more
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Late Cenozoic Moisture History of East Africa
TL;DR: Lake sediments in 10 Ethiopian, Kenyan, and Tanzanian rift basins suggest that there were three humid periods at 2.7 to 2.5 million years ago, superimposed on the longer-term aridification of East Africa.
Late Cenozoic Moisture History of East Africa
TL;DR: In this paper, lake sediments in 10 Ethiopian, Kenyan, and Tanzanian rift basins suggest that there were three humid periods at 2.7 to 2.5 million years ago (Ma), 1.9 to 1.7 Ma, and 1.1 to 0.9 Ma, superimposed on the longer-term aridification of East Africa.
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High- and low-latitude forcing of Plio-Pleistocene East African climate and human evolution.
Martin H. Trauth,Mark A. Maslin,Alan L. Deino,Manfred R. Strecker,Andreas G.N. Bergner,Miriam Dühnforth +5 more
TL;DR: High-latitude forcing is required to compress the Intertropical Convergence Zone so that East Africa becomes locally sensitive to precessional forcing, resulting in rapid shifts from wet to dry conditions.
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Geochronology and stratigraphy of late Pleistocene lake cycles on the southern Bolivian Altiplano: Implications for causes of tropical climate change
TL;DR: In this article, a chronology of changes in lake level over the past 120 k.y.t. is presented, and the authors suggest that paleolakes on the Bolivian Altiplano expanded in response to increased moisture in the Amazon and enhanced transport of that moisture onto the altiplano by strengthened trade winds or southward displacement of the Intertropical Convergence Zone (ITCZ).
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Simulated climate and biomes of Africa during the late quaternary: comparison with pollen and lake status data
TL;DR: In this paper, African pollen and lake data are compared with climate (CCM1, NCAR, Boulder) and vegetation (BIOME 1.2, GSG, Lund) simulations for the last glacial maximum and early to mid-Holocene (EMH).
References
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Journal ArticleDOI
Radiocarbon dating of East african lake levels.
TL;DR: The fluctuations of the key East African lakes discussed are summarized and a notable lack of correlations between high-latitude glacial advances or maxima and intervals of high lake levels have been demonstrated or suggested for tropical Africa, shows the introduction of new climato-stratigraphic terms such as hypothermal and interstadial of questionable value.
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The last interglacial ocean
William F. Ruddiman,Rose Marie L. Cline,James D Hays,Warren L. Prell,Theodore C Moore,Nilva G. Kipp,Barbara E. Molfino,George H. Denton,Terence J. Hughes,William L. Balsam,Charlotte A. Brunner,Jean Claude Duplessy,James L. Fastook,John Imbrie,Lloyd D Keigwin,Thomas B. Kellogg,Andrew McIntyre,R. K. Matthews,Alan C Mix,Joseph J Morley,Nicholas J Shackleton,S S Streeter,Peter R. Thompson +22 more
TL;DR: The final effort of the CLIMAP project was a study of the last interglaciation, a time of minimum ice volume some 122,000 yr ago coincident with the Substage 5e oxygen isotopic minimum.
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Lamont Radiocarbon Measurements VI
TL;DR: In contrast to previous radiocarbon measurement lists, this list contains only known-age samples, most of which formed during the past ten years as mentioned in this paper, and the measurements were made largely in order to gain an understanding of the distribution of radioc carbon within the dynamic carbon reservoir both today and at times in the past, since all materials forming in this reservoir today do not have the same C14/C12 ratio.
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Hydrochemistry of the Lake Magadi basin, Kenya
TL;DR: In this article, new and complete compositional data are presented for a large number of water samples from the Lake Magadi area, Kenya These water samples range from dilute inflow ( 300 g/kg dissolved solids) to very high concentrations (1:28:870:7600:16,800) and are related to each other by the concentration factors.