Zarys stratygrafii mikrofaunistycznej miocenu śląsko-krakowskiego

Abstract

OUTLINE OF MICROFAUNISTIC STRATIGRAPHY OF THE SILESIAN-CRACOVIAN MIOCENERemarks on the stratigraphical division In the Upper Silesian Basin and in the region of Cracow and Miechów, the Miocene sediments cover wide-spread areas. Due to the detailed studies of the stratigraphy and paleogeography of these sediments it is possible to attempt a comparison between the profile of the Miocene deposits of Moravia and the Miocene profile of the southern margin of the Święty Krzyż Mountains.Heretofore, in investigations of the stratigraphy of the Silesian-Cracovian Miocene, a predominant role has always been ascribed to its macrofauna (molluses), to its algae (lithotamnia) and to its chemical deposits (gypsum and salt formations). In order to establish the appropriate stratigraphical scheme, ananalysis of the values of the individual stratigraphical indexes is in order. Some of them maintain their value only under certain facial conditions, for instance, the lithotamnian limestones which in the Święty Krzyż Miocene constitute an important stratigraphical horizon, occur at other localities merely as thin intercalations in various stratigraphical positions.