Comparisons between the Upper Jurassic-Lower Cretaceous carbonate successions from northeast Serbia (Carpatho-Balkanides) and northwest Iran

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.