Morphology and formation history of the Altai peneplain (the Kurai ridge as an example)
статья в журнале
(ИГМ СО РАН)
дата публикации: 2015
In the result of geomorphological survey in the scale of 1: 50 000 performed in the central part of the Altai Mountains it was found that fragments of the Cretaecous-Paleogcnc peneplain preserved in the form of vast watershed areas in all the mountain ranges of the region, arc actually a ladder of planation surfaces of different age raised at different heights during the ncotectonic reactivation. A comparison of the explored area of the Kurai ridge with the technically stable Anabar-Udjinskoyc intcrfluvc (North of the Siberian platform), has shown the identity of gcomorphological structure of the watershed areas and allowed us to extrapolate the datings obtained for the reference Siberian site on different fragments of the planation surfaces in the Altai. On this basios we conclude that on the watershed of the Kurai ridge within one ncotcctonic block greatest height occupy fragments of the most ancient Middle Cretaceous peneplain, the Late Cretaceous level is lower by 30-40 m, Palcogenc - by 50-70 m, and Early Ncogcnc - by 170-200 m. the Good state of preservation of the denudation levels ladder indicates the insignificance of watersheds denudation during Ccnozoic.