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Glacial–interglacial records from sediments in Powell Basin, Antarctica

Published online by Cambridge University Press:  19 November 2018

Young-Suk Bak ,
Kyu-Cheul Yoo ,
Jae Il Lee  and
Ho Il Yoon
Young-Suk Bak*
Affiliation:
The Earth and Environmental System Research Center, Chonbuk National University, Jeonju 54896, Korea
Kyu-Cheul Yoo
Affiliation:
Korea Polar Research Institute, 26 Songdomirae-ro, Yeonsu-gu, Incheon 21990, Korea
Jae Il Lee
Affiliation:
Korea Polar Research Institute, 26 Songdomirae-ro, Yeonsu-gu, Incheon 21990, Korea
Ho Il Yoon
Affiliation:
Korea Polar Research Institute, 26 Songdomirae-ro, Yeonsu-gu, Incheon 21990, Korea
*
[email protected]
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Abstract

Palaeoenvironmental history is reconstructed from diatoms in two sediment cores, GC01-PW02 and GC03-PW02, recovered from Powell Basin, Antarctica. A total of 43 species belonging to 21 genera are identified from GC01-PW02. A total of 61 species belonging to 27 genera are identified from GC03-PW02. The number of diatom valves g-1 of dry sediment ranges from 0.1–48.3 × 106 valves g-1. Based on diatom abundance, six assemblage zones were identified from GC01-PW02, and five diatom zones were identified from GC03-PW02. Barren intervals represent glacial periods, while intervals with higher diatom abundances were deposited during interglacial periods and reduced sea ice cover. The occurrence of Rouxia leventerae only within the deepest zone of each of the cores indicates that the core sediments were deposited since marine isotope stage (MIS) 6.

Keywords

diatom zonesGC01-PW02GC03-PW02MIS 6
Type
Physical Sciences
Information
Antarctic Science , Volume 30 , Issue 6 , December 2018 , pp. 371 - 378
Copyright
© Antarctic Science Ltd 2018 

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