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New data on age and conditions of buried organic-rich sediments formation in the сentral Ob River

Author:
Maksimov, F. E., Savelieva, L. A., Laukhin, S. A., Kuznetsov, V. Yu., Arslanov, Kh. A., Petrov, A. Yu., Grigoriev, V. A., Levchenko, S. B.
Source:
Contemporary problems of ecology 2017 v.10 no.4 pp. 370-379
ISSN:
1995-4255
Subject:
Picea, boreal forests, climatic factors, floodplains, landscapes, rivers, sediments, terraces
Abstract:
This article presents the results of a comprehensive geochronological study of gyttja deposits from a section of a terrace above a floodplain located on the right bank of the Ob River near the town of Kolpashevo. According to the ²³⁰Th/U dating, the age of the gyttja could be dated in the range of 110–95 kyr. The results of spore–pollen analysis suggest that the gyttja deposit was formed in the period of a wide distribution of middle taiga forest landscapes with the dominance of spruce; the climatic conditions were similar to modern ones. These events probably took place in the interstadial time during MIS-5c or at the end of Kazantsevo interglacial period.
Agid:
5796442