A buried palaeosol and late Pleistocene unconformity in coastal deposits of the eastern Yellow Sea, East Asia SCIE SCOPUS

Cited 16 time in WEB OF SCIENCE Cited 16 time in Scopus
Title
A buried palaeosol and late Pleistocene unconformity in coastal deposits of the eastern Yellow Sea, East Asia
Author(s)
Lim, DI; Jung, HS; Kim, BO; Choi, JY; Kim, HN
KIOST Author(s)
Lim, Dhongil(임동일)Jung, Hoi Soo(정회수)
Publication Year
2004
Abstract
Deep-drill core sampling with a high-resolution seismic survey was carried out to identify a Holocene-late Pleistocene boundary in the eastern coast of the Yellow Sea, East Asia. Analysis of core sections revealed the existence of an oxidized and desiccated sedimentary layer, lying directly below a Holocene horizon (Unit 1) and being developed at the top of a late Pleistocene (Unit 11), possibly last interglacial tidal deposit. The buried oxidized-sedimentary layer is characterized by semi-consolidated, yellowish sediments showing signs of desiccation and alteration such as periglacial cryogenic structures, lithified trace fossils, depletion of smectite, and high geochemical weathering index (Ba/Sr ratio). These features, together with radiocarbon ages, suggests that the layer, defined as a palacosol developed in marine sediments, has formed as a result of prolonged subaerial exposure of Unit II sediments during the Wisconsinan sea-level lowstand, producing a regional unconformity (late Pleistocene unconformity). This unconformable bounding surface corresponds to a prominent near-surface reflector (R), which is observed in seismic profiles obtained across the drilled-core sections and further is traced ubiquitously across the Yellow Sea shelf. Consequently, the buried palaeosol layer associated with the seismic reflector presents a key horizon for the understanding of late Quaternary environmental changes and integrated stratigraphical correlation in the East Asian marginal seas. (C) 2004 Elsevier Ltd and INQUA. All rights reserved.
ISSN
1040-6182
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/5361
DOI
10.1016/j.quaint.2004.01.027
Bibliographic Citation
QUATERNARY INTERNATIONAL, v.121, pp.109 - 118, 2004
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Subject
FINE-GRAINED DEPOSITS; WEST-COAST; QUATERNARY SEDIMENTS; DISTRIBUTION PATTERN; SOUTHEASTERN COAST; MACROTIDAL FLAT; HAENAM BAY; LEVEL RISE; GOMSO BAY; KOREA
Type
Article
Language
English
Document Type
Article
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Related Researcher
Research Interests

Marine Geochemistry,Paleoceanography,Marine Pollution,해양지화학,고해양학,해양오염학

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