FORMATION AND PRE-ANTHROPOGEN EVOLUTION OF THE HYDROSPHERE OF BELARUS ARTICLE 1. HYDROSPHERE OF BELARUS AT THE PRE-PLATFORM STAGES OF GEOLOGICAL DEVELOPMENT. CRYPTOSIS
The concept of formation of the primary atmosphere and hydrosphere at pre-platform (pre-Proterozoic) stages of the geological development of the region is considered. The composition of hypothetical hydrospheres at all stages of geological development is analyzed taking into account mineralogy and geochemistry of the weathering crusts of crystalline rocks, the lithology of sedimentary formations, and the secondary mineral formation. At all stages of the hydrosphere formation, salt content of surface water bodies in most cases corresponded to levels of normal marine sediment genesis, less often - post-diagenetic mineralization growth to gypsum precipitation levels. The first demonstration of fresh water within the described territory was authentically marked by the upper proterozoic (the end of the riphean - the beginning of the vendian) glaciation with the formation of the tillites (approximately 750-720 million years ago the lower horizon and 680-650 million years - the upper horizon).