Lithofacies and palaeoenvironmental characteristics of the Suwałki outwash (Pleistocene, Northeast Poland)

Tomasz Zieliński


Litofacjalna i paleośrodowiskowa charakterystyka osadów sandru suwalskiego (plejstocen, północno-wschodnia Polska)

Glacifluvial sediments of the Suwałki outwash (Vistulian. NE Poland) are subdivided into seven lithofacies and five lithofacies associations and interpreted in terms of deposilional bedforms, stream channel topographies and palacoflow hydraulies. The associations comprise the deposits of main channel with longitudinal bars (A), sand-bed braided channel with transverse bars (B), shallow braided channel (C), catastrophic flood channel (D) and of abandoned channel (E). bulk of these sediments consists of sand which was deposited within transverse bars developed in the secondary channels of outwash braided system. Gravelly deposits were laid down in the main channels which during high-energy discharges were dominated by longitudinal bars. Lithofacies characteristics combined with palaeohvdraulic data indicate deposition of all these sediments in the proximal reach of the outwash system.

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