Silt/clay fractionation in surficial Marmara sediments: implication for water movement and sediment transport paths in a semi-enclosed and two-layered flow system (northeastern Mediterranean Sea) |
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| Authors: | M Ergin and M N Bodur |
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| Institution: | (1) Geological Research Center for Fluvial, Lacustrine and Marine Studies, Ankara University, Faculty of Science, Building F, B15, Tandogan, Ankara 06100, Turkey, TR;(2) Kahramanmaras Süt?üimam University, Faculty of Agriculture, Soil Department, Kahramanmaras, Turkey, TR |
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| Abstract: | Silt and clay fractions and hydrographic data indicate that the silt/clay ratios depend on topographically controlled currents,
water inflows, terrigenous input, and benthonic activities. The deep subbasins of the Marmara Trough with low-energy conditions
show the lowest silt/clay ratios (0.2–0.4). The silt/clay ratios in the ?anakkale Strait (1.0–1.7) decrease markedly at the
exit to the Aegean Sea (0.5–0.9) due to flow into a larger basin and the resultant lower current speed. Overall, under high-energy
conditions the clay sediments cannot settle and are swept away, resulting in high silt/clay ratios.
Received: 1 November 1997 / Revision received: 20 July 1998 |
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