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Sediment and pollen evidence for an early to mid-Holocene humid period in the eastern Sahara
A major problem in the study of Holocene palaeoenvironments of the arid and wind-deflated Sahara is the low preservation potential of sediments from which a record of past climatic change can beExpand
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Younger Dryas “black mats” and the Rancholabrean termination in North America
  • C. Haynes
  • Geology, Medicine
  • Proceedings of the National Academy of Sciences
  • 6 May 2008
Of the 97 geoarchaeological sites of this study that bridge the Pleistocene-Holocene transition (last deglaciation), approximately two thirds have a black organic-rich layer or “black mat” in theExpand
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Ages of Quaternary pluvial episodes determined by uranium-series and radiocarbon dating of lacustrine deposits of Eastern Sahara
Abstract As documented by radiocarbon dating and geoarchaeological investigations, the now hyperarid northwestern Sudan and southwestern Egypt experienced a period of greater effective moistureExpand
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Late Quaternary arroyo formation and climate change in the American Southwest
Arroyos, entrenched ephemeral streams that form in desert environments, first appeared in the arid and semiarid American Southwest after 8000 14 C yr B.P. For at least 7 k.y. prior to that time,Expand
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Subsurface Valleys and Geoarcheology of the Eastern Sahara Revealed by Shuttle Radar
The shuttle imaging radar (SIR-A) carried on the space shuttle Columbia in November 1981 penetrated the extremely dry Selima Sand Sheet, dunes, and drift sand of the eastern Sahara, revealingExpand
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A submillimetre imaging polarimeter at the James Clerk Maxwell Telescope
A polarimeter has been built for use with the Submillimetre Common-User Bolometer Array (SCUBA), on the James Clerk Maxwell Telescope (JCMT) in Hawaii. SCUBA is the first of a new generation ofExpand
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An independent evaluation of the Younger Dryas extraterrestrial impact hypothesis
Based on elevated concentrations of a set of “impact markers” at the onset of the Younger Dryas stadial from sedimentary contexts across North America, Firestone, Kennett, West, and others haveExpand
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Holocene vegetation zonation in the eastern Sahara
Recent discoveries of fossil-bearing Holocene lake sediments from the eastern Sahara have brought further confirmation and detail to earlier indirect evidence that a major pluvial episode occurredExpand
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On the Pleistocene Antiquity of Monte Verde, Southern Chile
The potential importance of the Monte Verde site for the peopling of the New World prompted a detailed examination of the collections from that locality, as well as a site visit in January 1997 by aExpand
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Geoarchaeological and paleohydrological evidence for a clovis-age drought in North America and its bearing on extinction
Abstract At the Murray Springs Clovis site in southeastern Arizona, stratigraphic and geomorphic evidence indicates that an abnormally low water table 10,900 yr B.P. was followed soon thereafter by aExpand
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