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Type: Article
Published: 2021-12-14
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Last interglacial environment of the Baikal Region (Southern Siberia, Russia) based on analysis of fossil invertebrates and plants

Borissiak Palaeontological Institute, Profsoyuznaya Str. 123, 117997, Moscow, Russia
Institute of Earth Sciences, St. Petersburg State University, Universitetskaya emb. 7/9, 199034, St. Petersburg, Russia
Komarov Botanical Institute, Popov Str., 2, 197376, St. Petersburg, Russia
Institute of Earth Sciences, St. Petersburg State University, Universitetskaya emb. 7/9, 199034, St. Petersburg, Russia
Institute of Earth Sciences, St. Petersburg State University, Universitetskaya emb. 7/9, 199034, St. Petersburg, Russia, State Pedagogical University of Russia, Moika 48, 191186, St. Petersburg, Russia
Russian State Geological Prospecting University (MGRI-RSGPU), Miklukho-Maklaya str., 23, 117485, Moscow, Russia
Earth Cryosphere Institute, Tyumen Scientific Centre SB RAS, Malygina str., 86, box 12, 625000, Tyumen, Russia
A.N. Severtsov Institute of Ecology and Evolution, Leninsky Prospect 33, 119071, Moscow, Russia
Southern Siberia Russia Insects crustaceans plant macrofossils pollen interglacial Uranium-Thorium dating climate

Abstract

New data on fossil insects, soil and freshwater invertebrates, plant macrofossils, pollen and spores were obtained from a problematic lower unit of the reference section Bely Yar-II (Tunka Rift, Baikal Region, Russia). The invertebrates show a natural succession from a small lake to a wetland; plant macrofossils confirm the early stages of succession. Pollen and spore data reflect a wide range of environments and vegetation from moderate climate supporting regional forests to relatively cold, dry parkland. New Uranium-Thorium data (99 ± 20 ka and 101 ± 13 ka), along with environmental reconstructions, indicate that the lower unit was probably formed during one of the cold sub-stages towards the end the last inter-glaciation (MIS5).

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