CALCAREOUS NANNOPLANKTON OF THE GEULHEMMERBERG K T BOUNDARY SECTION, MAASTRICHTIAN TYPE AREA, THE NETHERLANDS/

Light-microscopic analysis of the calcareous nannoplankton of the Geul hemmerberg section indicates the presence of the Late Maastrichtian Ne phrolithus frequens Zone and the Early Danian Biantholithus sparsus Zo ne, separated by a hiatus encompassing the earliest Danian. SEM analys is, however, indicates the presence throughout the section of Neobiscu tum romeinii, N. parvulum and small forms of Cruciplacolithus primus, taxa reported so far only from the Early Danian. If these are in situ, a Danian age for the whole Geulhemmerberg section cannot be excluded.