Jednostki glacjalne i interglacjalne w plejstocenie Wyżyny Miechowskiej i Niecki Nidziańskiej

• Main Author: Lindner, Leszek
• Format: Article in Journal/Newspaper
• Language: Polish
• Published: Państwowy Instytut Geologiczny - PIB 1988
• Subjects: Ice Sheet; Tundra
• Online Access: https://gq.pgi.gov.pl/pg/article/view/17256

GLACIAL AND INTERGLACIAL UNITS IN THE PLEISTOCENE OF THE MIECHÓW UPLAND AND NIDA BASIN Summary Due to recent detailed geologic investigations the area of the Miechów Upland and the Nida Basin (Fig. l) supplies with new data on extents and age of occurring Quaternary sediments and particularly of enclosed glacial and interglacial units (Figs. 2-6). TL dating of top sediments of the so-called Witów Series for 952 ±142 ka (Lub-1148) indicates a possible rejuvenation of them and reference to the period corresponding with the Narew Glaciation. Afterwards the described area was only occupied by San l (Elstera I, Don) and San 2 (Elstera II, Oka) głaciations. Ice sheet of the San l Glaciation had a smaller extent and after passing the Holy Cross Mts. and entering the Nida Basin, it reached the foot of the Miechów Upland (Fig. l). Iee sheet of the San 2 Glaciation, a till of which was TL dated for 455 ±68 ka (Lub-1145), occupied the whole described area reaching the Carpathians where its sediments delimit the maximum extent of the Pleistocene glaciations. In the northeastern Nida Basin (Figs. l and 3) glacial sediments of both these glaciations are separated by fluvial series and paleosol of the Ferdynandów Interglacial (Voigtstedt, Białowieża, Rosłav). During younger glaciations the described area occurred predominantly outside the extents of the Scandinavian glaciations, in periglacial conditions that favored mainly a deposition of loesses and fluvioperiglacial deposits (Figs. 5 and 6). TL datings of these loeesses proved the oldest ones to have been deposited about 170 ka and the youngest about 20 ka. These loesses comprise two interglacial soils and numerous initial soils of steppe- tundra type. The older interglacial soil represents the warming between Odra and Warta glaciations or within the Warta Glaciation. The younger interglacial soil overlain by loesses of the Wisła Glaciation, was correlated with the Eemian Interglacial.