PLEISTOCENE-HOLOCENE PALAEOENVIRONMENTAL RECORDS FROM PERMAFROST SEQUENCES AT THE KARA SEA COAST (NW SIBERIA, RUSSIA)

• Published in: GEOGRAPHY, ENVIRONMENT, SUSTAINABILITY
• Main Authors: Irina Streletskaya, Evgeny Gusev, Alexander Vasiliev, Gleb Oblogov, Anatoly Molodkov
• Format: Article in Journal/Newspaper
• Language: English
• Published: Lomonosov Moscow State University 2013
• Subjects: arctic coasts; permafrost; tabular massive ground ice; stable isotopes; syngenetic polygonal ice wedges; palaeoclimate; Geography (General); G1-922; Arctic; Kara Sea; Taymyr; Yenisey; Foraminifera*; Ice; wedge*; Siberia
• Online Access: https://doi.org/10.24057/2071-9388-2013-6-3-60-76; https://doaj.org/article/0a7e0446c6f54f0a943640b90a53a52c

The Kara Sea coasts were studied using comprehensive stratigraphic and geocryological methods. The paper presents the new analytical studies of ground ice and Quaternary deposits of Western Taymyr and presents the results of spore and pollen, foraminifera, grain-size, mineralogical, geochemical, oxygen isotopic, and other analyses. Several stratigraphic-geocryological transects from Yenisey and Gydan Bays enable us to refine the stratigraphy and palaeogeographical reconstruction of the environments and freezing of Late Pleistocene-Holocene sediments. Marine sedimentation conditions during the late Kargino time (MIS3) changed to continental conditions in MIS2 and MIS1. Marine sediments were frozen syn- and epigenetically with cryotexture and ground ice formation. Ice wedges formation corresponds to the end of the Pleistocene (MIS2) and during cooler periods of the Holocene.