LITOGENEZA I SEDYMENTACJA OSADÓW KENOZOIKU W PROFILU OTWORU WIERTNICZEGO SUCHOSTRUGA (NIECKA WARSZAWSKA)

Abstract

LITHOGENESIS AND SEDIMENTATION OF CAINOZOIC DEPOSITS IN THE SUCHOSTRUGA BOREHOLE SECTION (WARSAW TROUGH)Abstract. The Suchostruga borehole was drilled approximately 15 km east of Mszczonów. From the geologic point of view, it lies in the Warsaw Trough that is part of a tectonic unit called the Marginal Trough. The borehole is one of six reconnaissance wells drilled in the Mszczonów Sheet of the SMGP (Detailed Geological Map of Poland), scale 1:50 000. However, this is the only borehole that has documented a complete Cainozoic section. 284.6 m thick. Lithological and facies differences between deposits that accumulated in different sedimentary basins of the same age, considered based on adjacent sediments in this single section have been proved based on the grain-size analysis, composition of heavy and light minerals and petrographic composition of gravels. Additional confirmation of the inference is the results of palynological and micropaleontological investigations. The sediments were deposited in marine and terrestrial environments. Finally, they have been correlated to the chronostratigraphic units of the Paleoceue. Eocene. Miocene (Pliocene) and Quaternary. That is why the Suehostruga section can be considered a reference section for central Poland - a regional-scale hypostratotype. at least for the Warsaw Trough.