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The research was carried out in Tauragnai, Kiauliupys, Rimučiai and Alekniškės glaciofluvial deposits. Sand and gravel beds were deposited close to the glacier margin by ice meltwater streams interacted with the already formed end moraines at the Baltija Highland. Sediment structure analysis has shown that investigated deposits were formed in a dynamic sedimentary environment which is represented by a wide variety of lithofacies. These include tabular and trough cross-bedded sand bed repeated interchange with subhorizontally bedded sand and gravel with boulders. Due to a high change of local sedimentation conditions and meltwater discharge it is hard to assign these deposits to a specific genetic type. The subhorizontally laminated interchange of sand and gravel must have been formed in a stream and sheet flood environments with high energy. The energy of these flows weakens further from the edge of the glacier. When the water flow is supercritical, erosion occurs, and when it loses its energy, it becomes subcritical. The transition from a rapid supercritical flow to a slow subcritical is called a hydraulic jump, which causes sedimentation. The mechanism of the sedimentation process in such flow is not well studied. These mostly coarse-grained rhythmic sheet-shaped beds have a slight inclination away from the former glacial ice margin. Rhythmic subhorizontal long layers of gravel are well preserved in Tauragnai and Kiauliupys glaciofluvial deposits. The causes and mechanisms that led to the formation of such a change in lithofacies are little studied. More detailed studies would help to better understand the changes in sedimentation conditions along the glacial margins. [ABSTRACT FROM AUTHOR]