 ISSN 1392-110X ISSN 2029-056X (online) |
2010 m. Nr. 1-4 Lithological and petrographic features of tills in the Koźmin region and their value for stratigraphical interpretation of glacial Lake Koźmin deposits, Central Poland
In the middle section, the Warta River valley runs through the Adamów graben. The graben was characterized by subsidence since the end of the Paleogene and favoured accumulation during the Neogene and the Quaternary. The Quaternary deposits consist of several till horizons separated mainly by a series of fluvioglacial sand and a thick series of glaciolacustrine sediments. The research was concentrated on three upper levels of tills and selected series of sand available in Koźmin and Koźmin-Północ “Adamów” opencast mines. The lithological, petrographical features and long-axis azimuth of pebbles were analyzed. The results showed that the lower till could be dated to the Elsterian, middle till to the Wartanian, and the upper till is probably also Wartanian. Glaciolacustrine deposits which filled the erosional form and appeared in the middle till correlate with the end of the Wartanian. Keywords: till, indicator erratics, lithostratigraphy, stratigraphy, Saalian, middle Warta River valley |
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