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    The last reconnection of the Marmara Sea (Turkey) to the World Ocean : A paleoceanographic and paleoclimatic perspective

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    Date
    2008-07
    Author
    McHugh, Cecilia M. G.  Concept link
    Gurung, Damayanti  Concept link
    Giosan, Liviu  Concept link
    Ryan, William B. F.  Concept link
    Mart, Yossi  Concept link
    Sancar, Ummuhan  Concept link
    Burckle, Lloyd H.  Concept link
    Cagatay, M. Namik  Concept link
    Metadata
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    Citable URI
    https://hdl.handle.net/1912/2645
    As published
    https://doi.org/10.1016/j.margeo.2008.07.005
    Keyword
     Late Pleistocene-Holocene; Marmara Sea; Sea-level; Paleoshorelines; Black Sea; Mediterranean Sea 
    Abstract
    During the late glacial, marine isotope Stage 2, the Marmara Sea transformed into a brackish lake as global sea level fell below the sill in the Dardanelles Strait. A record of the basin’s reconnection to the global ocean is preserved in its sediments permitting the extraction of the paleoceanographic and paleoclimatic history of the region. The goal of this study is to develop a high-resolution record of the lacustrine to marine transition of Marmara Sea in order to reconstruct regional and global climatic events at 24 a millennial scale. For this purpose, we mapped the paleoshorelines of Marmara Sea along the northern, eastern, and southern shelves at Çekmece, Prince Islands, and Imrali, using data from multibeam bathymetry, high-resolution subbottom profiling (chirp) and ten sediment cores. Detailed sedimentologic, biostratigraphic (foraminifers, mollusk, diatoms), X-ray fluorescence geochemical scanning, and oxygen and carbon stable isotope analyses correlated to a calibrated radiocarbon chronology provided evidence for cold and dry conditions prior to 15 ka BP, warm conditions of the Bolling-Allerod from ~15 to 13 ka BP, a rapid marine incursion at 12 ka BP, still stand of Marmara Sea and sediment reworking of the paleoshorelines during the Younger Dryas at ~11.5 to 10.5 ka BP, and development of strong stratification and influx of nutrients as Black Sea waters spilled into Marmara Sea at 9.2 ka BP. Stable environmental conditions developed in Marmara Sea after 6.0 ka BP as sea-level reached its present shoreline and the basin floors filled with sediments achieving their present configuration.
    Description
    Author Posting. © Elsevier B.V., 2008. This is the author's version of the work. It is posted here by permission of Elsevier B.V. for personal use, not for redistribution. The definitive version was published in Marine Geology 255 (2008): 64-82, doi:10.1016/j.margeo.2008.07.005.
    Collections
    • Geology and Geophysics (G&G)
    Suggested Citation
    Preprint: McHugh, Cecilia M. G., Gurung, Damayanti, Giosan, Liviu, Ryan, William B. F., Mart, Yossi, Sancar, Ummuhan, Burckle, Lloyd H., Cagatay, M. Namik, "The last reconnection of the Marmara Sea (Turkey) to the World Ocean : A paleoceanographic and paleoclimatic perspective", 2008-07, https://doi.org/10.1016/j.margeo.2008.07.005, https://hdl.handle.net/1912/2645
     
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