ИСТИНА

Mamontovа Gora is exposure on the Aldan River left bank, located 325 km upstream of the Aldan mouth. The exposure extends along the coast for 10 km and consists of two altitudinal levels. The upper level with a relative height of 80-90 m is the original denudation surface, the lower level with a height of 70-75 m is a high terrace of Aldan. The research area is located in the zone of continuous permafrost with a ground temperature of -3 ...- 5°С. The exposure of Mamontova Gora has been studied since the 50s of the 20th century. The Mamontova Gora section is one of the most complete sections of the continental Neogene-Quaternary deposits of Eastern Siberia and is a reference for them. A large number of plant remnants (leaves, cones, nuts, fruits and seeds) allows for a rather detailed stratigraphic dissection of the section. Despite the long history of the section investigation, the researchers still have not reached a common opinion on the age and relationships of the sedimentary strata that make up Mamontova Gora. The work on the outcrops carried out by the authors in 2016 and 2018 made it possible to obtain new data on its cryostratigraphy in the central part of the 70-75 m terrace.