Great Sand Sea and Selima Sand Sheet, Eastern Sahara: Geochronology of Desertification
- 13 August 1982
- journal article
- other
- Published by American Association for the Advancement of Science (AAAS) in Science
- Vol. 217 (4560) , 629-633
- https://doi.org/10.1126/science.217.4560.629
Abstract
The relation of playa sediments and associated archeological sites with longitudinal dunes allows estimation of ages for the two uppermost strata of the Great Sand Sea. Active dune formation corresponds with interpluvial periods of hyperaridity; dune stability corresponds with semiarid pluvial periods. Archeological sites associated with truncated paleosols in the Selima Sand Sheet suggest a similar climatic relation and indicate that the isohyets of central Sudan shifted at least 400 kilometers northward during the peak of pluvials.Keywords
This publication has 12 references indexed in Scilit:
- A handaxe of Libyan Desert glassPublished by Cambridge University Press (CUP) ,1982
- Relict drainages, conical hills, and the eolian veneer in southwest Egypt—Applications to MarsJournal of Geophysical Research, 1982
- Quaternary Geology and Archaeological ObservationsThe Geographical Journal, 1980
- Pluvial Lakes of North-Western SudanThe Geographical Journal, 1979
- The Ecology of Early Man in Southern AfricaScience, 1977
- The Prehistory of the Egyptian SaharaScience, 1976
- Immunity in CancerScience, 1975
- Dates for the Middle Stone Age of East AfricaScience, 1975
- Tektites and silica-glass (With Plates XVI and XVII.)Mineralogical Magazine and Journal of the Mineralogical Society, 1939
- Silica-glass from the Libyan DesertMineralogical Magazine and Journal of the Mineralogical Society, 1934