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A. Krauss, E. Mycielska-Dowgiałlo, K. Szczepanek

Abstract


PRELIMINARY DATA ON THE AGE OF THE DEPOSITS IN THE VISTULA RIVER VALLEY, NEAR TARNOBRZEG

Summary
The purpose of this paper is to present the preliminary results of geomorphological studies made in 1964 within the Vistula River valley, along the sector Baranów-Sandomierz. The series of the deposits distinguished within the valley are shown in the profile (Fig. 1). In the lowermost part of the river bed there rests a thin layer of quartz with an admixture of local and Carpathian rocks, directly on the substratum of the pre-Quaternary rocks. This layer is cemented by iron compounds. Higher up, there are found sands with gravels and large blocks of northern rocks. This layer, in turn, is covered by an arenaceous series 10 m in thickness. Here are found traces of old channels, frequently filled up with plant detritus. In a close contact with the arenaceous series are dune forms, in which traces of the Neolithic culture have been observed. Mud deposits represent the last layer uniformly covering the whole area of the overflood terrace.
In the light of palaeobotanical and stratigraphical analyses it appears to be possible that the deepest channel of the Vistula River was formed at the time of the Eemian Interglacial. Here, at the decline of the glaclal period, arenaceous-gravelly and arenaceous series were deposited. The top of the arenaceous series probably belongs to the Holocene. The dunes had been formed during the Sub-boreal period and shortly after that time the overoflood terrace was covered by mud deposits.

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