ПАЛЕОГЕОГРАФИЧЕСКИЙ СЦЕНАРИЙ ПОЗДНЕГО МЕЛА – КАЙНОЗОЯ ЦЕНТРАЛЬНОЙ ЧАСТИ БАЙКАЛЬСКОГО РЕГИОНА

The publication presents a review of alterations of stagnant elements of the Baikal region that occurred during formation and development of the Baikal rift from the Late Cretaceous. Nowadays the natural complex contains the elements varying in age and genesis as they developed during three large stages. In the course of the regional evolution, peneplains altered into uplifted platoes, alpinetype and goltsy mountain ranges; humid quasitropics and subtropics developed into arid zones with the Mediterraneantype climate and moderate and nival zones which were subjected to recurrent mountainandvalley glaciations. Water basins became ultradeep and hosted water species populations which are unique in terms of the biodiversity and endemic features. The main stages of environmental alterations were separated by phases of tectonic movement and tectonic inversions. The alterations’ review is based on consecutive series of cartographic representations of the paleogeographic scenarios.Рассмотрены преобразования косных элементов природы Байкальского региона за время формирования и развития Байкальского рифта с позднего мела. Современный природный комплекс включает элементы разного возраста и разного генезиса, сформировавшиеся в течение трех крупных этапов. За это время природа региона прошла путь от пенепленизированных равнин до приподнятых плато, альпинотипных и гольцовых горных районов, от влажных квазитропиков, субтропиков до аридных зон с климатом средиземноморского типа, до умеренной и нивальной зон, c периодически повторявшимися горно-долинными оледенениями. За это же время водные бассейны преобразовались в ультраглубоководные с уникальным по биоразнообразию и уровню эндемизма водным населением. Основные этапы преобразований природы разделены тектоническими фазами и инверсиями тектонических движений. Указанные преобразования рассмотрены на базе серии картографических цветных изображений палеогеографических сценариев

PALEOGEOGRAPHIC SCENARIO OF THE LATE CRETACEOUS – CENOZOIC FOR THE CENTRAL PART OF THE BAIKAL REGION

The publication presents a review of alterations of stagnant elements of the Baikal region that occurred during formation and development of the Baikal rift from the Late Cretaceous. Nowadays the natural complex contains the elements varying in age and genesis as they developed during three large stages. In the course of the regional evolution, peneplains altered into uplifted platoes, alpinetype and goltsy mountain ranges; humid quasitropics and subtropics developed into arid zones with the Mediterraneantype climate and moderate and nival zones which were subjected to recurrent mountainandvalley glaciations. Water basins became ultradeep and hosted water species populations which are unique in terms of the biodiversity and endemic features. The main stages of environmental alterations were separated by phases of tectonic movement and tectonic inversions. The alterations’ review is based on consecutive series of cartographic representations of the paleogeographic scenarios