Аннотация:The morphostructure of the region is a natural result of active geodynamics in the eastern Stanovoe upland. Extreme seismic conditions become apparent in rare devastating – up to 10-11 in the Mercally scale, as well as in frequent light earthquakes. Seismic events affect topography and produce seismodeformations of different scale and morphology. Arial disturbances (like the New Namarakit Lake in the South-Muya Mountains origin) and, more often, local deformations (like destructions of the Kodar ridge rocky saddles or clamms [gorges] opening) are evident. Using morphotectonical analysis methods the morphostructural scheme of the Kodar-Udocan section of the Baikal rift zone (perhaps pull-apart basin) is done. In our model piedmont and mountain territories are divided in five level groups of blocks. Neotectonical movements’ amplitude is estimated at 5000 m.