The newest results of micropaleontological and sedimentological investigations of the
Upper Jurassic-Lower Cretaceous carbonate succession in northeast Serbia, Carpatho-Balkanides
are presented and compared to northwest Iran. On the basis of determined calpionellid
association dominated by the representatives of calpionellid genera Tintinnopsella,
Crassicollaria and Calpionella the investigated limestones are assigned to the Upper Tithonian-
Lower Berriasian. Petrographic analysis of thin-sections led to the recognition of three basin
microfacies types: bioclastic wackestone, bioclastic peloidal wackestone/packstone and
mudstone. These microfacies characterize the SMF 3. A pelagic toe-of-slope Facies Zone was
recorded in both areas. In order to make comparison of microfacies and calpionellid
assemblages, the Shal Formation is selected in northwest Iran.
