Land subsurface setup in the area of Babtai

Aleksandras Šliaupa

The area of the former rural district Babtai lies in the southern part of the Central Lithuanian plain, or in the zone of the Central Lithuanian juncture with respect to the crystalline basement. Formation of sedimentary cover occurred under complicated geological conditions. Sedimentation periods were frequently alternating with the denudation ones. The second half of the Carboniferous and the first half of the Permian, the end of the Permian, and the time span from Upper Triassic to Lower Jurassic should be distinguished during the denudation periods, when movements of crustal blocks along the tectonic faults took place. Some locally denudated sedimentary beds had been fractured in the area of Babtai at a certain time period in such a way. Therefore, rocks of different ages had contacts within the zone of the tectonic faults.

During the Quaternary, there were six glaciations of the area of Babtai. Thus, because of multiple glaciations, a new type of deposit layer of a hundred or even more metres thick had been formed. Due to contrasting movements of crust in the Quaternary, a neotectonic setup being formed determined dynamics of continental ice sheets and type of recent topography and hydrographic network.