Evidence and implications of massive erosion along the Strait of Istanbul (Bosphorus)

Erkan Gökaşan*, Hüseyin Tur, Berkan Ecevitoǧlu, Tolga Görüm, Ahmet Türker, Buǧser Tok, Faruk Çaǧlak, Halim Birkan, Mehmet Şimşek

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

34 Citations (Scopus)


The Strait of Istanbul (SoI) (Bosphorus) is a narrow valley, which has evolved tectonically from a stream, and in which thick sediment deposits have accumulated in the course of its evolution. Detailed seismic and multi-beam bathymetric data have revealed that the upper parts of the deeper channel deposits consist of parallel strata, which have mostly been eroded subsequently to their deposition. The resulting erosion surface is represented by the present channel floor in the strait, the estimated volume of the eroded material being approximately 2×108 m3. Erosion rate and seafloor morphology indicate that the flow direction was from the south to the north. This inner channel may have been formed by an abrupt flooding of the Black Sea by Mediterranean waters at the beginning of the latest connection between the Marmara and the Black seas. Subsequently, the Mediterranean bottom current of the modern two-way flow system, which was established at about 5-4 ka b.p., has given the latest shape to the strait floor.

Original languageEnglish
Pages (from-to)324-342
Number of pages19
JournalGeo-Marine Letters
Issue number5
Publication statusPublished - Nov 2005
Externally publishedYes


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