Changes of the microfossil assemblages in the Oligocene of the Zasavje region

Abstract

Variations in sedimentation processes involed environmental modifications, which indubitably affected also microfossil assemblages. Because of changes in fresh-water and marine developments, qualitative and quantitative changes in composition and appearance of microfossil assemblages took place. Such changes in assemblages of the nannoplankton, diatoms, palynomorphs and the Foraminifera are presented in this paper.