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2011 | OriginalPaper | Buchkapitel

6. Geological Structure of the Quaternary Sedimentary Sequence in the Klaipėda Strait, Southeastern Baltic

verfasst von : Albertas Bitinas, Aldona Damušytė, Anatoly Molodkov

Erschienen in: The Baltic Sea Basin

Verlag: Springer Berlin Heidelberg

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Abstract

The Klaipėda Strait is located between the Curonian Spit and the mainland coast of Lithuania. It links the Curonian Lagoon with the Baltic Sea. The Quaternary sequence is represented here by Pleistocene sediments formed during a few glaciations and interglacials. Its uppermost part is composed of Late glacial and Holocene sediments originating from different stages of the Baltic Sea development. One of the main problems of Quaternary geology in the vicinities of the Klaipėda Strait, as well as in the whole Lithuanian Coastal Area, is the reliable geochronology and stratigraphic correlation of sediments. To contribute to the solution of this problem, the infrared optically stimulated luminescence (IR-OSL) dating of the lacustrine inter-till sandy sediments was done during the engineering geological mapping of the Klaipėda Strait. The absolute majority of the IR-OSL ages obtained for the investigated inter-till sediments fall within the age range of marine isotope stages (MIS) 5d-5a. The subsequent more detailed examination of geological setting of Quaternary sequence has led to the assumption that the sampled inter-till sediments occur not in situ, i.e. they are found as blocks (rafts) in a thick till bed that have been formed by the ice advance during the Weichselian early pleniglacial maximum (MIS 4). This conclusion does not support the former standpoint that the till beds beneath the bottom of the Klaipėda Strait were formed during the Warthanian (Medininkai, MIS 6) glaciation.

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Vorheriges Kapitel Late Quaternary Climate Variations Reflected in Baltic Sea Sediments

Nächstes Kapitel Coastlines of the Baltic Sea – Zones of Competition Between Geological Processes and a Changing Climate: Examples from the Southern Baltic

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Titel: Geological Structure of the Quaternary Sedimentary Sequence in the Klaipėda Strait, Southeastern Baltic
verfasst von: Albertas Bitinas
Aldona Damušytė
Anatoly Molodkov
Verlag: Springer Berlin Heidelberg
Buch: The Baltic Sea Basin
Print ISBN: 978-3-642-17219-9

Electronic ISBN: 978-3-642-17220-5

Copyright-Jahr: 2011
DOI: https://doi.org/10.1007/978-3-642-17220-5_6