At the Upper Pripyat drainage basin the ice lobe retreat was not unidirectional during the regression stage of the Dnieper glaciation. After the stabilization at the maximum phase the ice retreat changed into secondary advance (oscillation). During the growth of the Styr lobe the most active ice was confined to the lowest parts of the bedrock topography. Maximum deposition of debris was also selective at the lobe frontal part. The formation of stationary (Rafalov) end moraine ridge was finished at the beginning of humid conditions. At the marginal part of the lobe within the area of bedrock uplift the increasing warming resulted in the formation of glaciofluvial deltas, their crestal parts representing elementary esker cones and esker centers. Delta outwash growth was only stopped by ice margin stabilization during short cooling’s. Later, when deglaciation of dead ice took place under conditions of continuous warming, only outwash plains were formed.