S.V. Rasskazov1,2, S.V. Snopkov2,3, A.P. Papaev4, D.I. Parfenov2, D.A. Petrov2, B. Khaidakov4
1Institute of the Earth's Crust SB RAS, Irkutsk, Russia
2Irkutsk State University, Irkutsk, Russia
3Siberian School of Geosciences, Irkutsk National Research Technical University, Irkutsk, Russia
4Orlik Secondary School, Orlik, Russia
Rasskazov Sergei Vasilievich,
doctor of geological and mineralogical sciences, professor,
664025, Irkutsk, Lenin st., 3,
Irkutsk State University, Faculty of Geology,
Head of Dynamic Geology Char,
664033, Irkutsk, Lermontov st., 128,
Institute of the Earth's Crust SB RAS,
Head of Laboratory for Isotopic and Geochronological Studies,
tel.: (3952) 51–16–59,
email: rassk@crust.irk.ru.
Snopkov Sergey Viktorovich,
Candidate of Geological and Mineralogical Sciences, assistant professor,
664025, Irkutsk, Lenin st., 3,
Irkutsk State University, Faculty of Geology,
664074, Irkutsk, Kurchatov st., 3,
Siberian School of Geosciences, Irkutsk National Research Technical University,
Leading Researcher,
email: snopkov_serg@mail.ru.
Papaev Alexey Purboevich,
Candidate of Geography,
Deputy Director for Educational Work,
Orlik Secondary School, Orlik settlement, Okinsky district, Buryat Republic,
email: papaev13@rambler.ru.
Parfenov Daniil Igorevich,
664025, Irkutsk, st. Lenina, 3,
Irkutsk State University, Faculty of Geology,
student of the second course.
Petrov Dmitry Alexandrovich,
664025, Irkutsk, st.Lenina, 3,
Irkutsk State University, Faculty of Geology,
student of the second course.
Khaidakov Bayaskhalan,
Orlik Secondary School, Orlik settlement, Okinsky district, Buryat Republic.
Abstract. Field observations were performed on the Ust-Zhom-Bolok lava cover of the Oka basin in the southeastern part of Eastern Sayans. In the Sailag and Nomto-Gol sections, loess-like deposits, underlying and overlying the lava cover, were identified. It is inferred that the lava cover erupted in conditions of a dry cold climate at the end of the Pleistocene and was dissected by the Oka River in conditions of a warmer climate and abundant water content of the territory in the Holocene.
Keywords: basalts, loess-like deposits, alluvium, Holocene, late Pleistocene, Eastern Sayans.
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