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Late Oligocene Calcareous Nannofossils From Albanian-Thessalian Intramontane Basin (Bozdovec Section, Albania) – A Quantitative Approach, Mădălina-Elena Kallanxhi, Stjepan Ćorić, Arben Koçiu
Late Oligocene Calcareous Nannofossils From Albanian-Thessalian Intramontane Basin (Bozdovec Section, Albania) – A Quantitative Approach, Mădălina-Elena Kallanxhi, Stjepan Ćorić, Arben Koçiu
Studia UBB Geologia
Quantitative and semi-quantitative analyses of calcareous nannofossils were performed on samples collected from Bozdovec Section (Albanian-Thessalian intramontane basin, Albania). The calcareous nannofossil assemblages are dominated by: small reticulofenestrids, Cycligargolithus floridanus, Coccolithus pelagicus, Sphenolithus spp., Reticulofenestra scrippsae, Helicosphaera spp., Clausicoccus spp., Reticulofenestra bisecta, Cycligargolithus abisectus. Biostratigraphically, the studied outcrop is assigned to the Late Oligocene NP25 - Sphenolithus ciperoensis Zone. In the Mediterranean area, this interval can be correlated with the MNP25a - Sphenolithus ciperoensis Zone, while according to the zonation for low to middle latitudes the investigated material would belong to the CNO5 - Sphenolithus …
Foraminiferal Biostratigraphy And Paleoenvironments Of The Middle Eocene Deposits From The Northern Part Of The Tarcău Nappe (Eastern Carpathians, Romania), Raluca Bindiu, Sorin Filipescu
Foraminiferal Biostratigraphy And Paleoenvironments Of The Middle Eocene Deposits From The Northern Part Of The Tarcău Nappe (Eastern Carpathians, Romania), Raluca Bindiu, Sorin Filipescu
Studia UBB Geologia
Middle Eocene foraminiferal assemblages have been analyzed from three representative sections of bathyal deposits cropping out along the Brodina Valley and Voroneţ Valley in the northern part of the Tarcău Nappe (Eastern Carpathians, Romania). The foraminiferal assemblages are dominated by agglutinated species with tubular forms (Psammosiphonella cylindrica, Nothia spp., Bathysiphon sp.), globular (Saccammina spp., Psammosphaera spp.), coiled (Recurvoides spp., Reticulophragmium spp.) and flattened streptospiral (Paratrochamminoides spp., Trochamminoides spp.). Coarsely agglutinated taxa are characteristic for the “flysch – type” agglutinated foraminiferal biofacies. The depositional setting was probably upper to middle bathyal, as suggested by the …
New Data On The Early - Middle Badenian Transition In The Nw Transylvanian Basin (Romania) Revealed By The Planktonic Foraminifera Assemblages, Rodica Filipescu, Sorin Filipescu
New Data On The Early - Middle Badenian Transition In The Nw Transylvanian Basin (Romania) Revealed By The Planktonic Foraminifera Assemblages, Rodica Filipescu, Sorin Filipescu
Studia UBB Geologia
The planktonic foraminifera assemblages recovered from two cores drilled in Cluj-Napoca (NW Transylvanian Basin) demonstrate connections of the basin to the open seas before the middle Badenian evaporite deposition. Assemblages suggest clear changes in the environments, with an initial transgressive trend, followed by a decrease in the rate of sea-level rise, and finally a sea-level fall. The occurrence of planktonic foraminifera (mainly Globorotalia) offers a good potential for correlation of the pre-evaporitic interval with the uppermost Langhian and can be used for tracing the early-middle Badenian boundary.