Delta formation at the southern entrance of Istanbul Strait (Marmara sea, Turkey): a new interpretation based on high-resolution seismic stratigraphy |
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Authors: | Erkan Göka?an Oya Algan Hüseyin Tur Engin Meriç Ahmet Türker Mehmet ?im?ek |
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Institution: | 1. Natural Sciences Research Center, Y?ld?z Technical University, 34349, Besiktas, Istanbul, Turkey 2. Institute of Marine Sciences and Management, Istanbul University, 34470, Vefa, Istanbul, Turkey 3. Department of Geophysics, Istanbul University, Avc?lar, Istanbul, Turkey 4. Department of Navigation, Hydrography and Oceanography, Turkish Navy, ?ubuklu, Istanbul, Turkey
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Abstract: | A detailed stratigraphic investigation based on high-resolution seismic profiles revealed that the delta at the southern entrance
of the Istanbul Strait consists of three parasequence sets. The lowermost parasequence shows a sea-level stillstand at the
beginning of the lowstand systems tract, possibly at 11,000±1,100 a b.p., whereas the upper two parasequences reflect deposition
at lowstand and during the subsequent transgression. A maximum flooding surface may be developing on the delta at present.
The delta is located on the eastern side of the Istanbul Strait canyon, with east–west prograding parasequences. The development
of the delta is clearly associated with the Kurbağalı Stream on the east coast, and not with the Black Sea outflow through
the strait. The geometry of the delta indicates a radial architecture arranged from northeast to southwest. |
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