Late Barremian-Early Aptian Urgonian Limestones from the south-eastern Ku aj Mountains (Carpatho-Balkanides, Eastern Serbia)

The newest results of sedimentological and paleontological investigations of part of the Urgonian Limestones studied in the surrounding of Boljevac on the SE slopes of the Ku aj Mts. (Carpatho-Balkanides, eastern Serbia) are presented. On two localities, near the village Faca Vajali, four types of microfacies and one subtype within the bioclastic limestones were separated. The characteristics of the depositional environments of the investigated Urgonian Limestones were studied and are discussed. At the base of the established rich microassociations of foraminifera and algae, the vertical distribution of foraminiferal species was precisely defined which enabled the determination the the age of this part of the Urgonian Limestones as Late Barremian-Early Aptian.