Доклады Академии наукДоклады Академии наук0869-5652The Russian Academy of Sciences1626310.31857/S0869-56524883277-281Research ArticleNew pleistocene key section Ulan-Zhalga of the Western TransbaikaliaErbajevaM. A.erbajeva@ginst.ruShchetnikovA. A.erbajeva@ginst.ruKazanskyA. Yu.erbajeva@ginst.ruMatasovaG. G.erbajeva@ginst.ruKhenzykhenovaF. I.erbajeva@ginst.ruFilinovI. A.erbajeva@ginst.ruNamzalovaO. D.-Ts.erbajeva@ginst.ruNechaevI. O.erbajeva@ginst.ruGeological Institute, Siberian Branch of the Russian Academy of SciencesVinogradov Institute of Geochemistry, Siberian Branch of the Russian Academy of SciencesInstitute of the Earth`s Crust, Siberian Branch of the Russian Academy of SciencesIrkutsk Scientific Center, Siberian Branch of the Russian Academy of SciencesLomonosov Moscow State UniversityGeological Institute of the Russian Academy of SciencesTrofimuk Institute of Petroleum Geology and Geophysics, Sibirian Branch of the Russian Academy of Sciences2609201948832772812509201925092019Copyright © 2019, Russian academy of sciences2019<p>The currant paper presents the preliminary results of the multidisciplinary study of the new Pleistocene section Ulan-Zhalga (512940.75 С, 1072018.11 В) discovered in the Western Transbauikalaia in 2017. On the base of the paleontological, paleomagmetic, and lithological data the early, middle and late Pleistocene sediments were recognized in the section. The analysis of the rich small mammal fossils resulted in to trace the paleoenvironmental and climatic changes in the region during the Quaternary. The unique alternation of the 19 faunistic horizons and 11 fossil soils in the whole section, the high correlation of the paleomagnetic and paleontological data allow us to refer the studied section Ulan-Zhalga to addition new late Cenozoic Key section of the south Eastern Siberia. The new geological and paleontological data would be important for paleogeographical reconstruction and biostratigraphic analysis.</p>pleistocenenew Key sectionsmall mammalsWestern Transbaikaliaплейстоценновый опорный разрезмелкие млекопитающиеЗападное Забайкалье[Гиббард Ф. // Геология и Геофизика. 2015. Т. 56. № 4. С. 873-875.][ Erbajeva M.A., Alexeeva N.V. // Quatern. Intern. 2000. V. 68-71. P. 67-75.][ Алексеева Н.В. Эволюция природной среды Западного Забайкалья в позднем кайнозое. М.: ГЕОС, 2005, 141 с.][ Кузьмин М.И., Ярмолюк В.В. // Геология и Геофизика. 2006. Т. 47. № 1. С. 7-25.]