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The Middle Siberian volcanic plateau is characterized with respect to its paleoecological environments. In this area, volcanism commenced in the Severodvinian (Vishkilian) Age. The lower (tuffaceous) part of the plateau section (Lebedev deposits) was formed in the Vyatkian Age. Its middle (tufflava) part (Khungtukun deposits) is correlative with the Goudikeng Formation (interval of 65-111 m) in the Dalongkou type section of China and corresponds to the Quadrocladus pachyphyllus ... Echinolimnadia mattoxi Zone. The top of this sedimentary unit (111 m up from the base of the Goudikeng Formation) should be correlated with the base of the Otoceras Ecozone. The upper (lava) part of the plateau (Putorana deposits) corresponds to the interval of 111-210 m, belongs to the Elatocladus linearis ... Cornia vosini Ecozone, and is older than the Hindeodus parvus Zone, which is now considered as the basal unit of the Triassic marine sequences. The volcanic plateau section shows now evidence of any biotic crisis. [ABSTRACT FROM AUTHOR]

It is well known that the assessment of the geological features of a territory offers many posibilities to emphasize deterministic connections between their peculiarities and the manner in which they are reflected within the landscape. This fact is extremely useful for a better understanding of the morphology of Baraolt Depression too. In this area, the geological components hold an important role in imposing the general pattern of the the major landforms as well as in the development of some specific and actual geomorphological processes. In this respect, the tectonics and the geologic structure had the role to divide the depression in hollows, bays and basins, compartments and to impose an elongated form for these divisions. The fluvial processes that took place in these areas put finally in evidence an assimetric transversal profile of the most important valleys. In its turn, the lithology imposed the genesis of some flat, barely sloped areas, developed mainly through the volcanic plateaus. The presence of the coal pushed the human activity to a so called anthropogenic parasitism, which determines a present day accelerated evolution of the landscapee [ABSTRACT FROM AUTHOR]