The de Long Trough: a newly discovered glacial trough on the East Siberian continental margin; Climate of the Past; Vol. 13, iss. 9

The de Long Trough: a newly discovered glacial trough on the East Siberian continental margin; Climate of the Past; Vol. 13, iss. 9

Bibliographic Details
Parent link:Climate of the Past: international scientific journal.— , 2005-
Vol. 13, iss. 9.— 2017.— [P. 1269-1284]
Corporate Author: Национальный исследовательский Томский политехнический университет (ТПУ) Институт природных ресурсов (ИПР) Кафедра геологии и разведки полезных ископаемых (ГРПИ)
Other Authors: O'Regan M. Matthew, Backman J. Jan, Barrientos N. Natalia, Cronin T. M. Thomas M., Gemery L. Laura, Kirchner N. Nina, Mayer L. Larry, Nilsson J. Johan, Noormets R. Riko, Pearc C. Christof, Semiletov I. P. Igor Petrovich, Stranne C. Christian, Jakobsson M. Martin
Summary:Title screen
Ice sheets extending over parts of the East Siberian continental shelf have been proposed for the last glacial period and during the larger Pleistocene glaciations. The sparse data available over this sector of the Arctic Ocean have left the timing, extent and even existence of these ice sheets largely unresolved. Here we present new geophysical mapping and sediment coring data from the East Siberian shelf and slope collected during the 2014 SWERUS-C3 expedition (SWERUS-C3: Swedish – Russian – US Arctic Ocean Investigation of Climate-Cryosphere-Carbon Interactions). The multibeam bathymetry and chirp sub-bottom profiles reveal a set of glacial landforms that include grounding zone formations along the outer continental shelf, seaward of which lies a ?>??65?m thick sequence of glacio-genic debris flows. The glacial landforms are interpreted to lie at the seaward end of a glacial trough – the first to be reported on the East Siberian margin, here referred to as the De Long Trough because of its location due north of the De Long Islands. Stratigraphy and dating of sediment cores show that a drape of acoustically laminated sediments covering the glacial deposits is older than ??50?cal?kyr?BP. This provides direct evidence for extensive glacial activity on the Siberian shelf that predates the Last Glacial Maximum and most likely occurred during the Saalian (Marine Isotope Stage (MIS) 6).
Language:English
Published: 2017
Subjects:
электронный ресурс
труды учёных ТПУ
Арктика
Северный Ледовитый океан
шельфы
ледяной покров
Online Access:https://doi.org/10.5194/cp-13-1269-2017
Format: Electronic Book Chapter
KOHA link:https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=656202

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