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Cyclocryostratigraphy of yedoma. Part 1.
Abstract.The author formulates a new line of research of permafrost and, in particular, homogeneous yedoma, - cyclocryostratigraphy. Cyclo-cryostratigraphy studies the rotation of different vertical frozen soil units of permafrost sediments in yedoma sections. The study demonstrates the cyclicity in the flysch formations in pre-Quaternary and Quaternary sediments on the Black Sea coast, near the Novomikhailovskoye settlement., in the Berriasian-Valanginian exposure near the village of Konakhkend, Azerbaijan, in the Eocene sediments of the Navagir range, the northwestern spurs of the Caucasus, the Abrau peninsula, in interstratifying sands and sandy loams in the Nagym section in the mouth of the Olenyok channel. The cyclicity in the vertical arrangement of pseudomorphs and subterranean veins outside the permafrost zone has been investigated. The main research methods are lithological, cryostratigraphical, radiocarbon, isotope, geochemical. The author detects cyclicity during the field research, and verifies its parameters with analytical determinations. The main results of the study include the successive transition from flysch cycles to the cyclicity of clays and cyclostratigraphic features of paleo-sections with pseudomorphs and ground vein. The author analyzes mesocyclic bedding of ground veins and pseudomorphs in the sections of Western Europe: Aschersleben in Germany, Kesselt, Remicourt and Harmignies in Belgium. The author analyzes stratification of pseudomorphs in the Late Pleistocene stratum in the Grove section in the north of the Netherlands. In the north of Italy, in the valley of the Po river, a multi-tier complex of pseudomorphs in loess strata is considered. A scheme for stratification of pseudomorphs in the Kotkino area on the left bank of the Soyma River, the tributary of the Pechora River, is considered.
Keywords: Late Pleistocene, loess, palaeopermafrost, varve clays, flysch, Milankovitch cycles, radiocarbon, cyclocryostratigraphy, paleosol, pseudomorph
Article was received:17-03-2017
This article written in Russian. You can find full text of article in Russian here .