Late Pleistocene-Holocene evolution of the northern shelf of the Sea of Marmara


Cagatay M. N. , Eriş K. K. , Ryan W. B. F. , Sancar Ü. S. , POLONIA A., AKCER S., ...More

MARINE GEOLOGY, vol.265, pp.87-100, 2009 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 265
  • Publication Date: 2009
  • Doi Number: 10.1016/j.margeo.2009.06.011
  • Journal Name: MARINE GEOLOGY
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.87-100
  • Keywords: Sea of Marmara, shelf, sea level, sapropel, seismic stratigraphy, isotopes, BLACK-SEA, LEVEL CHANGES, DEPOSITIONAL-ENVIRONMENTS, POSTGLACIAL TRANSGRESSION, RADIOCARBON CHRONOLOGY, BENTHIC FORAMINIFERA, MEDITERRANEAN SEA, ANATOLIAN FAULT, BOSPORUS STRAIT, SOUTH
  • Istanbul Technical University Affiliated: Yes

Abstract

Chirp sub-bottom profiling, multibeam bathymetric mapping and a combination of faunal and isotopic analysis of molluscs and foraminifera in sediment cores on the northern shelf of the Sea of Marmara (SoM) provide evidence of sea-level excursions, water exchanges between the adjacent Mediterranean and Black Seas, and oscillating salinity over the last 160 ka bp. During the marine isotope stages MIS-2, MIS-3, MIS-4 and MIS-6 the SoM disconnected from the Mediterranean Sea and evolved into a lake. During MIS-1, MIS-5 and MIS-7, the SoM reconnected and became salty once again. Sapropels formed shortly after each invasion of Mediterranean saltwater observed in our cores. Concurrent suboxic-dysoxic conditions prevailed over quite shallow substrates on the shelf.