TY - JOUR
T1 - Cretaceous/Tertiary boundary sections in the east Balkan area, Bulgaria
AU - Preisinger, Anton
AU - Aslanian, Selma
AU - Stoykova, Kristalina
AU - Grass, F.
AU - Mauritsch, Hermann Johann
AU - Scholger, Robert
PY - 1993
Y1 - 1993
N2 - Cretaceous/Tertiary boundary sections in Bulgaria on the coast of the Black Sea near Bjala, 35 km south of Varna have been identified by micro- and nannofossils, magnetic reversals and event markers. The hemipelagic sediments of profile Bjala 2b and Bjala 2c show an iridium enrichment in the boundary clay, a minimum of CaCO3, shocked quartzes, a mass extinction of Cretaceous nannoplankton species, as well as a bloom of survivors at the K/T boundary and the first appearance of new nannoplankton species after the K/T event. The comparison of biostratigraphic and magnetostratigraphic results provides a time scale for the evolution of these new nannoplankton species. -from Authors
AB - Cretaceous/Tertiary boundary sections in Bulgaria on the coast of the Black Sea near Bjala, 35 km south of Varna have been identified by micro- and nannofossils, magnetic reversals and event markers. The hemipelagic sediments of profile Bjala 2b and Bjala 2c show an iridium enrichment in the boundary clay, a minimum of CaCO3, shocked quartzes, a mass extinction of Cretaceous nannoplankton species, as well as a bloom of survivors at the K/T boundary and the first appearance of new nannoplankton species after the K/T event. The comparison of biostratigraphic and magnetostratigraphic results provides a time scale for the evolution of these new nannoplankton species. -from Authors
UR - https://www.scopus.com/pages/publications/0027836819
U2 - 10.52321/GeolBalc.23.5.3
DO - 10.52321/GeolBalc.23.5.3
M3 - Article
AN - SCOPUS:0027836819
SN - 0324-0894
VL - 23.1993
SP - 3
EP - 13
JO - Geologica Balcanica
JF - Geologica Balcanica
IS - 5
ER -