Rozwój plejstoceńskiej doliny Wisły środkowej ze szczególnym uwzględnieniem przełomu przez wyżyny południowopolskie

• Main Authors: Pożaryski, Władysław, Maruszczak, Henryk, Lindner, Leszek
• Format: Article in Journal/Newspaper
• Language: unknown
• Published: Państwowy Instytut Geologiczny - PIB 1994
• Subjects: Ice Sheet
• Online Access: https://gq.pgi.gov.pl/pg/article/view/19737

DEVOLOPMENT OF THE PLEISTOCENE VALLEY OF THE MIDDLE VISTULA RIVER, CONSIDERING ESPECIALLY ITS GAP IN THE SOUTH POLISH UPLANDS Summary In this paper, referring to the publications of Pożaryski [18, 19] published forty years ago, we take into account results of new chronostratigraphic studies. Basic materials for this study are: a) unpublished data of Pożaryski's field investigations and examination of several hundred borings made in 1953 along cross lines ofthe Vistula valley (Fig. 1); b) partially published [20] results of TL datings of the basic Pleistocene profiles. It has been found that in the axial part of the Vistula river gap in the South Polish Uplands, between Zawichost and Puławy (Fig. 1), four main deposit series of the river flowing from south occur. They are separated by erosion surfaces and denoted by letter indices F, M, LE and V (Figs 4,5). The age of these series has been defined in relation to the tills occurring in the valley sides. On the basis of the TL datings the tills have been correlated with the glaciations: Odranian (Saalian I), Sanian 2 (Elsterian II) and Sanian 1 (Elsterian I). Under the last of the tills mentioned we can find residua of still older glacial deposits, probably of the Nidanian (pre-Elsterian) glaciation. On the basis of paleogeomorphologic criteria we can divide the oldest fluvial deposits (F) into two subseries which, however, are not differentiated in regard to lithology (so they are not separated in Fig. 5). The first subseries was formed after retreat of the Nidanian ice sheet, and it was connected with the valley 2 - 3 times narrower and 25 – 35 m deeper than present one. The second subseries is younger than Sanian 1 tills and was accumulated in the valley of a width similar to the present one; its bottom was about 20 m below the present one. Three following series (M, LE, V) occur at smaller depths, accumulated during successive glacial-interglacial cycles in the valley of a width similar to the present one (Figs 4, 5). This valley was especially intensely filled ...