Transgressive Pleistocene Cycles and Their Place on the Milankovich Scale

• Published in: IOP Conference Series: Earth and Environmental Science
• Main Authors: Pomortsev, O A, Filippov, V R, Rozhin, S S
• Format: Article in Journal/Newspaper
• Language: unknown
• Published: IOP Publishing 2021
• Subjects: Laptev Sea; laptev; lena river
• Online Access: http://dx.doi.org/10.1088/1755-1315/666/3/032068; https://iopscience.iop.org/article/10.1088/1755-1315/666/3/032068; https://iopscience.iop.org/article/10.1088/1755-1315/666/3/032068/pdf

Abstract The problem of cyclic organization of geological environment in the Pleistocene is specified based on of materials on absolute chronology of marine and intracontinental sediments of North and Central Asia and North America. New data on absolute chronology of fluvial transgressive-regressive cycles of the Pleistocene in comparison with the known solar climate scale of M. Milankovich’s are given. It is established that the two most ancient dates of the terrace sediments of the Lena River (234 and 182 thousand years ago) and the Vilyuy River (300 and 176 thousand years ago), as well as three groups of dates of younger Late Pleistocene and Holocene fluvial formations in the valley of the Lena River, Rocky Mountains and in the Primorsky Lowland of the Laptev Sea (36 - 42.8; 27-29 and 8-10 thousand years ago) correlate with the M. Milankovic’s curve, describing the variability of the Earth’s solar climate with the period of about 41000 years. The oldest dates - 300 and 234 thousand years ago, and the date series in the chronological range 27-29 thousand years ago (five dates) coincide with the cold extremums of the M. Milankovic scale. Dates of 182 and 176 thousand years ago, as well as series of the dates in the range 36-42 thousand years ago (four dates) and 8-10 thousand years ago (3 dates) tend to warm extremums of the same scale.