G. Yu. Yamskikh, N. Yu. Zharinova, A. A. Yamskikh, D. E. Makarchuk, R. A. Kolesnikov

Paleogeographic characteristics of the Karginsky interstadial paleosols formation conditions in the Tatyshev section of the Krasnoyarsk depression

Abstract. The Tatyshev section of the Karginsky pedocomplex on the 35–45-meter Lagernaya terrace of the Yenisei River was comprehensively studied in the Krasnoyarsk depression. Radiocarbon and thermoluminescence dating demonstrated that the soils were formed in the Early, Middle, and Late Karginsky periods. There were characterized macro- and micromorphological characteristics, physical and chemical properties of the soils: grain-size composition, humus content and its fractional composition, carbonates content, pH, sum of exchangeable bases, and gross macroelement composition. Phytolith and spore-pollen analyses showed the dynamics of climate change and vegetation cover composition during the soil formation within the terrace itself (Tatyshev section) and adjacent elevated areas of the left bank of the Yenisei River valley (Yasnoe-1 section). During the Karginsky interstadial the Krasnoyarsk depression highlights three periods of soil formation and two periods of sedimentation, which correlate well with climate changes in other areas of Siberia in this period. Loess-like deposits from the time of the Karginsky soil formation contain a very small amount of pollen and spores, which is associated not only with the deposits genesis, climatic conditions of their formation, but also with their preservation.

Keywords: paleogeography, environmental reconstructions, paleosol, palynology, Krasnoyarsk depression