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Pollen the age sediments and ice wedges in the Gyda River mouth
Vasil'chuk Alla Constantinovna

Doctor of Geography

Leading Scientific Associate, M. V. Lomonosov Moscow State University

119991, Russia, Moscow, Leninskie Gory Street, GSP-1, 1, faculty of Geography, Scientific Research Laboratory of Geoecology of the North

alla-vasilch@yandex.ru
Другие публикации этого автора
 

 
Vasil'chuk Yurii Kirillovich

Doctor of Geology and Mineralogy

Professor, the department of Geochemistry of Landscapes and Geography of Soils, M. V. Lomonosov Moscow State University

119991, Russia, g. Moscow, ul. Leninskie Gory, 1, of. 2009

vasilch_geo@mail.ru

Abstract.

The outcrop of 7-m terrace in the mouth of Gyda River (70°53ʹ41ʺ N. 78°30ʹ14ʺ E) is the object of the study. There are two generations of ice wedges and four stages of ice lens occurred in peaty sand. Syngenetic ice wedges are in paragenesis with massive ice. Considerable reworking of organic material is proved. Seven cycles of vegetation changes corresponded to local pollen zones. Their duration is about 0.5-2 ka. Sediments accumulated at alternation of subaerial and subaueous stages in 3-13 ka BP.Ice wdges accumulated at the end of the Late Pleistocene in 11-12 ka BP and in the Holocenein 3-4 ka BP. The total annual thawing index variated from 200 to 800 oC x day

Keywords: Climate Changes, tundra, isotopes, massive ice, 14C aging, ice wedge, spored, pollen, Reworking, pollen spectra

DOI:

10.7256/2453-8922.2018.1.25949

Article was received:

05-04-2018


Review date:

05-04-2018


Publish date:

07-04-2018


This article written in Russian. You can find full text of article in Russian here .

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