WĘGLANOWOŚĆ, OBTOCZENIE ZIAREN I MINERAŁY CIĘŻKIE W FORMACJACH PALEOGENU I NEOGENU ŚRODKOWOZACHODNIEJ POLSKI

Abstract

CARBONATE CONTENT, GRAIN ROUNDNESS AND HEAVY MINERALS IN PALEOGENE AND NEOGENE FORMATIONS OF MIDDLE WEST POLANDAbstract. The most indicative qualities of four Paleogene formations (Oligocene) and four Neogene formations (Miocene), 40 samples of which have been the subject of the standard lithopetrographic analysis, prove to be carbonate content, grain roundness and composition of heavy minerals. Consequently, on the basis of these features, the lithostratigraphic position of the sediments may be determined, which is of high importance for stratigraphic examinations of short drill core intervals remaining the main research material of the analyzed deposits of the Polish Lowland. Oligocene marine formations are characterized by high carbonate content, medium grain roundness and varying composition of heavy minerals. As far as Oligocene and Miocene continental formations are concerned, low carbonate content and generally angular grains as well as significant differences in the heavy minerals’ composition and percentage may be observed.