Dating Quaternary volcanism and incision by the River Tigris at Diyarbak[inodot]r, southeast Turkey super()

New high-precision Ar-Ar dating of basalt underlying the city of Diyarbak[inodot]r, southeast Turkey, constrains the Quaternary incision history of the River Tigris, strengthening the pre-existing chronology based on magnetostratigraphy and K-Ar dates. The basalt, which overlies Tigris terrace grave...

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Bibliographic Details
Published in:Journal of quaternary science 2007-01, Vol.22 (4), p.387-393
Main Authors: Bridgland, David R, Dem[idot]r, Tuncer, Seyrek, Al, Pringle, Malcolm, Westaway, Rob, Beck, Anthony R, Rowbotham, George, Yurtmen, Sema
Format: Article
Language:English
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Freshwater
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Summary:New high-precision Ar-Ar dating of basalt underlying the city of Diyarbak[inodot]r, southeast Turkey, constrains the Quaternary incision history of the River Tigris, strengthening the pre-existing chronology based on magnetostratigraphy and K-Ar dates. The basalt, which overlies Tigris terrace gravel 70 m above the river, is part of the Karacada[gbreve] shield volcano complex centred ca. 60 km to the southwest. The reverse-magnetised Diyarbak[inodot]r basalt, one of relatively few flow units to reach the Tigris valley axis, has been dated to 1196 +/- 19 ka (+/-2[sigma]). Two lower terraces have been recognised in the Diyarbak[inodot]r area, 46 and 32 m above the present river, with at least one other further downstream. From this evidence the rate of Middle-Late Pleistocene incision by the Tigris can be estimated; it probably reached ca. 0.07 mm a super(-1), reflecting the characteristic global increase in uplift rates observed at that time. Copyright 2007 John Wiley & Sons, Ltd.
ISSN:0267-8179
DOI:10.1002/jqs.1074