Pollen record and age determination of a sediment core from the Kara Sea ...

• Main Authors: Kraus, Matthias, Matthiessen, Jens, Stein, Ruediger
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 2003
• Subjects: Siberian River Run-Off SIRRO; Kara Sea; Siberia
• Online Access: https://dx.doi.org/10.1594/pangaea.804561; https://doi.pangaea.de/10.1594/PANGAEA.804561

AMS-14C dated sediment cores from the Ob and Yenisei estuaries and the adjacent inner Kara Sea were investigated to determine the siliclastic and organic carbon fluxes and their relationship to paleoenvironmental changes. The variability of sediment fluxes during Holocene times is related to the post-glacial sea-level rise and changes in river discharge and coastal erosion input. Whereas during the late/middle Holocene most of the terrigenous sediments were deposited in the estuaries and the areas directly off the estuaries, huge amounts of sediments accumulated on the Kara Sea shelf farther north during the early Holocene before about 9 Cal. kyrs. BP. The maximum accumulation at that time is related to the lowered sea level, increased coastal erosion, and increased river discharge due to the final stage of mountain deglaciation of the Putoran Massif. Increased supply of Yenisei-derived material indicated by peak magnetic susceptibility values probably occurred in climate-related pulses culminating near 11, ... : Supplement to: Kraus, Matthias; Matthiessen, Jens; Stein, Ruediger (2003): A Holocene marine pollen record from the northern Yenisei Estuary (southeastern Kara Sea, Siberia). In: Stein, R; Fahl, K; Fütterer, D K; Galimov, E M & Stepanets, O V (eds.), Siberian River Run-off in the Kara Sea: Characterisation, Quantification, Variability, and Environmental Significance, 488 pp. Proceedings in Marine Sciences, Elsevier, Amsterdam, 6, 433-456 ...