Sea level changes and depositional environments in the Izmit Gulf, eastern Marmara Sea, during the late glacial-Holocene period (Articolo in rivista)

Type
Label
  • Sea level changes and depositional environments in the Izmit Gulf, eastern Marmara Sea, during the late glacial-Holocene period (Articolo in rivista) (literal)
Anno
  • 2003-01-01T00:00:00+01:00 (literal)
Alternative label
  • Cagatay M.N.(1), .Görür N.(2), Polonia A.(3), Demirbag E.(1), Sakinç M.(1) , Cormier M.H.(4), Capotondi L. (3), McHugh C(4), Emre O.(5), Eris K. (1) (2003)
    Sea level changes and depositional environments in the Izmit Gulf, eastern Marmara Sea, during the late glacial-Holocene period
    in Marine geology (Print)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Cagatay M.N.(1), .Görür N.(2), Polonia A.(3), Demirbag E.(1), Sakinç M.(1) , Cormier M.H.(4), Capotondi L. (3), McHugh C(4), Emre O.(5), Eris K. (1) (literal)
Pagina inizio
  • 159 (literal)
Pagina fine
  • 173 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#altreInformazioni
  • I.F. = 1.497 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 202 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#descrizioneSinteticaDelProdotto
  • The purpose of this paper is to discuss the sea-level changes and depositional environments in the Gulf of Izmit during the late glacial-Holocene period. The presence of the –65 m shoreline in both the Karamürsel and the Western Izmit basins indicate that the 55 m-deep Hersek sill separating the two basins was much deeper prior to the Younger Dryas than its present level. This in turn implies that there was not a considerable time lag in connection of the Western Izmit and Karamürsel basins after the flooding by marine waters. It seems that the sill depth has become shallower with time by the northward progradation of the Hersek Delta sediments. If the Gölcük sill has had its present sill depth of –38 m in the past, according to the global sea-level curve (e.g., Fairbanks, 1989) the marine waters would have spilled over the Gölcük Sill at about 9 14C kyr BP (10.5 kyr, Th/U age) and convert the Gölcük Basin into a marine realm. (literal)
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • 1- ITU, MadenFakültesi,Turkey; 2- ITU, MadenFakültesi and TUBITAK Marmara Research Centre, Turhey 3- ISMAR-CNR Bologna, Italy 4- Lamont-Doherty earth Observatory, New York, USA 5-MTA Genel Müdürlügü, Ankara (literal)
Titolo
  • Sea level changes and depositional environments in the Izmit Gulf, eastern Marmara Sea, during the late glacial-Holocene period (literal)
Abstract
  • Offshore and onshore stratigraphic studies, together with high-resolution shallow seismic reflection profiling and multibeam bathymetric mapping, were carried out in the western and central part of the Izmit Gulf. These studies indicate that the Izmit Gulf was a lacustrine environment as part of the Marmara “lake” during the late glaciation and early deglaciation until ~12 kyr BP, when the Marmara basin was inundated by the Mediterranean waters. Correlation of 14C-dated onshore and offshore stratigraphic units in the western Izmit Gulf indicates that generally coarse late glacial sediments overlie a marked erosion surface formed during the low water level of the Marmara “Lake”. These coarse sediments are succeeded by 10.4-7 kyr BP old transgressive and by late Holocene post-transgression mud units. The bathymetry and subbottom chirp profiles clearly show that the palaeoshoreline of this lake was located at -85 m, having been controlled by the bedrock sill depth of the Çanakkale Strait. Another palaeoshoreline observed –65 m on northern margin of the Western Izmit and Karamürsel basins was probably formed during the Younger Dryas sea-level stillstand. The shelf areas during about this time were colonized by bioherms, which were subsequently drowned and disappeared after further rise of the sea level. The presence of a –65 m marine paleoshoreline in the Karamürsel basin indicate that the sill restricting this basin to the west was much deeper than its present –55 m level and placed further south. The Gölcük basin restricted by a –38 m sill to its west, was probably not flooded by marine waters until ~9 kyr BP. (literal)
Prodotto di
Autore CNR
Insieme di parole chiave

Incoming links:


Prodotto
Autore CNR di
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#rivistaDi
Insieme di parole chiave di
data.CNR.it