TURONIAN MARKER FORAMINIFERA ASSOCIATIONS FROM THE SOUTHERN PART OF THE EASTERN CARPATHIANS: DAMBOVITA VALLEY-INTORSURA BUZAULUI AREA
Theodor Neagu
Abstract
Theodor Neagu
Abstract
Within the Turonian deposits of the area beteen Dambovitza Valley and the upper part of the Buzau Valley the foraminiferal fauna is represented by two very distinct assemblages. One of them mainly consists of planctonic foraminifera - up to 90 % (Whiteinella, Helvetoglobotruncana, Dicarinella, Marginotruncana, Hedbergella, Praeglobotruncana, Schackoina). The remaining 10 % belong to benthic (agglutinated and calcareous ) foraminifera. The other association consists totally of small and primitive agglutinated taxa with siliceous wall cement and a long stratigraphic range. The corresponding biozones show also a relatively large range (Bulbobaculites problematicus, Uvigerinammina jankoi ): from the Upper Cenomanian to the Lower Senonian. The comparative study of these two micropaleontological assemblages allows a correlation between the standard (areal) biozone established on planktonic foraminifera and the local agglutinated deep water assemblages.
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Within the Turonian deposits of the area beteen Dambovitza Valley and the upper part of the Buzau Valley the foraminiferal fauna is represented by two very distinct assemblages. One of them mainly consists of planctonic foraminifera - up to 90 % (Whiteinella, Helvetoglobotruncana, Dicarinella, Marginotruncana, Hedbergella, Praeglobotruncana, Schackoina). The remaining 10 % belong to benthic (agglutinated and calcareous ) foraminifera. The other association consists totally of small and primitive agglutinated taxa with siliceous wall cement and a long stratigraphic range. The corresponding biozones show also a relatively large range (Bulbobaculites problematicus, Uvigerinammina jankoi ): from the Upper Cenomanian to the Lower Senonian. The comparative study of these two micropaleontological assemblages allows a correlation between the standard (areal) biozone established on planktonic foraminifera and the local agglutinated deep water assemblages.
Key concepts: Foraminifera, Biozone, Geology, Paleontology, Benthic zone, Cenomanian, Biostratigraphy, Range (aeronautics)