Universität zu Köln

Roeser, Patricia Angelika, Franz, Sven Oliver, Litt, Thomas, Ulgen, Umut Baris, Hilgers, Alexandra, Wulf, Sabine ORCID: 0000-0003-0229-7656, Wennrich, Volker ORCID: 0000-0003-3617-1963, On, Sena Akcer, Viehberg, Finn A., Cagatay, M. Namik and Melles, Martin ORCID: 0000-0003-0977-9463 (2012). Lithostratigraphic and geochronological framework for the paleoenvironmental reconstruction of the last similar to 36 ka cal BP from a sediment record from Lake Iznik (NW Turkey). Quat. Int., 274. S. 73 - 88. OXFORD: PERGAMON-ELSEVIER SCIENCE LTD. ISSN 1873-4553

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Abstract

New sediment cores were recovered from two sites in the central part of Lake Iznik with the overall aim of reconstructing past environmental conditions of the Marmara region. The composite profile presented here, IZN09/LC2&LC3, encompasses the late Pleistocene to Holocene transition (c. 36 ka cal BP) which is the longest lacustrine record in this region obtained to date. A lithostratigraphical and geochronological framework builds the basis to establish a composite section for first inferences on the paleo lake Iznik. The recovered sedimentary record was divided into five stratigraphic units which can be correlated between the different coring locations. The proposed age-depth model is based on eleven C-14 dates (eight radiocarbon-dated levels) and two tephra layers, supported by three OSL ages. The modeled age distribution of the Ca/Ti ratio and magnetic susceptibility express variations in the carbonate accumulation in balance with clastic sediment input. Starting from the end of MIS 3 with high clastic input, Lake Iznik passed through a low lake-level during the Last Glacial Maximum (LGM), delineated by a sublitoral sedimentary facies, and reduced sedimentation rates. After c. 18 ka cal BP, the onset of primary carbonate deposition might be linked to meltwater inflow into the lake as well as onset of lake productivity. From this time onward, there is a gradual increase in carbonate accumulation punctuated by the occurrence of an iron-sulfidic layer which coincides with the Younger Dryas event. At the early Holocene, the lake presents a minimum level as reflected by the maximum carbonate production, followed by a lake level rise at c. 9 ka cal BP when it reached a level similar to the modern situation. (C) 2012 Elsevier Ltd and INQUA. All rights reserved.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Roeser, Patricia Angelika UNSPECIFIED UNSPECIFIED UNSPECIFIED Franz, Sven Oliver UNSPECIFIED UNSPECIFIED UNSPECIFIED Litt, Thomas UNSPECIFIED UNSPECIFIED UNSPECIFIED Ulgen, Umut Baris UNSPECIFIED UNSPECIFIED UNSPECIFIED Hilgers, Alexandra UNSPECIFIED UNSPECIFIED UNSPECIFIED Wulf, Sabine UNSPECIFIED orcid.org/0000-0003-0229-7656 UNSPECIFIED Wennrich, Volker UNSPECIFIED orcid.org/0000-0003-3617-1963 UNSPECIFIED On, Sena Akcer UNSPECIFIED UNSPECIFIED UNSPECIFIED Viehberg, Finn A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Cagatay, M. Namik UNSPECIFIED UNSPECIFIED UNSPECIFIED Melles, Martin UNSPECIFIED orcid.org/0000-0003-0977-9463 UNSPECIFIED
URN:	urn:nbn:de:hbz:38-481613
DOI:	10.1016/j.quaint.2012.06.006
Journal or Publication Title:	Quat. Int.
Volume:	274
Page Range:	S. 73 - 88
Date:	2012
Publisher:	PERGAMON-ELSEVIER SCIENCE LTD
Place of Publication:	OXFORD
ISSN:	1873-4553
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language REGENERATIVE-DOSE PROTOCOL; LATE PLEISTOCENE; MARMARA SEA; BLACK-SEA; CLIMATIC-CHANGE; SOMMA-VESUVIUS; LEVEL CHANGES; HOLOCENE; AGE; LUMINESCENCE Multiple languages Geography, Physical; Geosciences, Multidisciplinary Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/48161