CONDITIONS OF KAME FORMATION NEAR VILLAGE OF MASHIV (VOLHYNIAN POLISSIA)

Abstract

Kames located in the Volhynian Polissya remain the most widespread and the least studied type of relict glacial landform. The article is focused on the specific conditions of kames creation within the peripheral parts of the Volhynian Polissya glacial bed elevation and their significant role in the formation of fissure net in the zones of deadened ice compression inherited from the stages of their inactivity. These compression zones were predetermined by the general planned configuration of the glacial bed landform climaxes. The presented reservoir is located to the north of the village of Mashiv and belongs to a complex of similar glacial accumulations crowed at the culmination of pre-glacial relief and placed at a considerable distance from the marginal formations of the maximum stage of the Dnieper glaciation. The morphological and geological structure of the form is analyzed to explain the conditions of its formation. It is revealed that its structure is dominated by fine-grained sediments; textural and structural features of them allow distinguishing two lithofacial complexes. The basis of the form is loamy sandy and sandy lake-ice deposits covered by a complex of fine-medium-grained sandy fluvioglacial sediments. The morphology of the form, its correlation with the elements of buried pre-glacial relief and the textural peculiarities of the described section deposits, allow to state that the accumulation of the material occurred within a semi-flowing or stagnant during certain periods basin filled with sediments of a small convey water-glacial outcasts; they were accumulated by activity of low energy melt water flows within the peripheral part of the ice glade. The glade was formed on the fracture zone line of the inactive (dead) ice, laid above the glacial bed landform climaxes. The textural and structural features of the form give reason to identify it as kame. Key words: Volhynian Polissia, deglaciation, kames, sedimentation, lithofacies analysis, glaciolacustrine and glaciofluvial sediments.