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A new Antarctic foraminiferal species for detecting climate change in sub-Recent glacier-proximal sediments

Published online by Cambridge University Press:  01 October 2009

Wojciech Majewski  and
Andrzej Tatur
Wojciech Majewski*
Affiliation:
Institute of Paleobiology, Polish Academy of Sciences, Twarda 51/55, 00-818 Warszawa, Poland
Andrzej Tatur
Affiliation:
Department of Antarctic Biology, Polish Academy of Sciences, Ustrzycka 10/12, 02-141 Warszawa, Poland
*
*[email protected]
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Abstract

Cribroelphidium webbi sp. nov. is the only adequately described sub-Recent elphidiid foraminifer from Antarctica. In Admiralty Bay (King George Island, South Shetland Islands), it is found at several locations within inner fiord setting at water depths between 33 and 165 m, but most commonly shallower than 100 m. In outer basins this foraminifer is absent. In the cores analysed, C. webbi sp. nov. is present in well-constrained sub-Recent horizons that are clearly related to climate warming and deglaciation. These horizons represent a diachronous facies marker rather than a single stratigraphic layer. Cribroelphidium webbi sp. nov. shows clear association with retreating tidewater glaciers, therefore it is an important sensitive glacier-proximal indicator. It appears that it shares similar ecologic affinities with Cribroelphidium excavatum clavatum, which is widely distributed throughout the Arctic.

Keywords

benthic foraminiferaCribroelphidium webbi sp. nov.stable isotopestidewater glaciersWest Antarctica
Type
Biological Sciences
Information
Antarctic Science , Volume 21 , Issue 5 , October 2009 , pp. 439 - 448
Copyright
Copyright © Antarctic Science Ltd 2009

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