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The paleoclimate of the eastern desert of Jordan during marine isotope stage 9
Authors:Abdulkader M Abed  Suha Yasin  Rushdi Sadaqa  Zayed Al-Hawari
Institution:aDepartment of Applied and Environmental Geology, University of Jordan, Amman 11942, Jordan;bNatural Resources Authority, P. O. Box 7, Amman, Jordan
Abstract:Two Cardium horizons from the topmost Azraq Formation in the eastern desert of Jordan were investigated and dated by U/Th at 330 ka; MIS 9. Fossil diversity and abundance, especially for Charophytes and gastropods with the absence of palygorskite, dolomite and evaporites, suggest the presence of a fresh water lake changing to a brackish environment at certain time intervals. A lake or possibly several smaller and shallower lakes occupied an area of about 50 km wide within the Azraq Basin. The present-day arid climate cannot support the presence of lakes in the eastern desert of Jordan, and thus MIS 9 in Jordan must have been much wetter. The source of humidity was most probably more intense Mediterranean cyclones associated with warmer than present MIS 9. However, the possibility of summer monsoon rain from the south cannot be fully excluded.
Keywords:Paleoclimate  Jordan  MIS 9  Quaternary  Umari  Azraq  Eastern desert of Jordan
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