CAMPANIAN AND MAASTRICHTIAN AMMONITES OF THE MIDDLE VISTULA RIVER VALLEY, POLAND: A STRATlGRAPHIC-PALEONTOLOGICAL STUDY
A monographic elaboration of the Campanian and Maastrichtian ammonites of the Middle Vistula river valley is presented in the paleontological part.
The stratigraphic part contains a revision of so far described sequences of that area’s Campanian and Maastrichtian ammonites and an updating of biostratigraphic units from the viewpoint of their suitability for chronostratigraphic divisions.
The biostratigraphic zones distinguished in this paper are interpreted as a basis for chronostratigraphic units for the extra - Carpathian area of Poland. The applicability of these zones exceeds, of course, the boundaries of this region in particular the Bostrychoceras polyplocum. Didymoceras donezianum and Nostoceras sp. nov. zones of the upper part of the Upper Campanian. Contemporary European standard stratigraphic schemata suggested for the upper part of the Upper Campanian are here interpreted as too general ones, which should be replaced by
a diagram based on biostratigraphic units of the Middle Vistula river valley. Concepts of the standards of boundaries of stages and substages have also been presented and discussed in this paper.