Fossil coccospheres from the K/T boundary section from Geulhemmerberg, The Netherlands

摘要

The recent discovery of well preserved, complete spheres of Biantholithus sparsus in a clay layer from the K/T boundary interval in the Geulhemmerberg section resulted in a search for coccospheres of other taxa. Applying the same new preparation- and SEM techniques, coccospheres of over 30 Cretaceous and Tertiary species were found; they are illustrated and briefly described in this paper. Based on the excellent state of preservation of the coccospheres of several Cretaceous species it is suggested that they survived the K/T boundary event(s).