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Algan O.,Institute of Management Sciences | Yalcin M.N.,Lstanbul University | Ozdogan M.,Lstanbul University | Yilmaz Y.,Kadir Has University | And 9 more authors.
Quaternary Research | Year: 2011

An extensive rescue excavation has been conducted in the ancient harbor of L̇stanbul (Yenikapi) by the Sea of Marmara, revealing a depositional sequence displaying clear evidence of transgression and coastal progradation during the Holocene. The basal layer of this sequence lies at 6. m below the present sea level and contains remains of a Neolithic settlement known to have been present in the area, indicating that the sea level at ~. 8-9. cal ka BP was lower than 6. m below present. Sea level advanced to its maximum at ~. 6.8-7. cal ka BP, drowning Lykos Stream and forming an inlet at its mouth. After ~. 3. cal ka BP, coastal progradation became evident. Subsequent construction of the Byzantine Harbor (Theodosius; 4th century AD) created a restricted small basin and accumulation of fine-grained sediments. The sedimentation rate was increased due to coastal progradation and anthropogenic factors during the deposition of coarse-grained sediments at the upper parts of the sequence (7th-9th centuries AD). The harbor was probably abandoned after the 11th century AD by filling up with Lykos Stream detritus and continued seaward migration of the coastline. © 2011 University of Washington.

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