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Biostratigraphy and paleoenvironment of the Upper Cretaceous deposits in the northern Tarcau Nappe (Eastern Carpathians) based on foraminifera and calcareous nannoplankton

• Geologica Carpathica
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• Volume 64 No.2 / April 2013

Published:

Pages: 117 - 132

DOI: https://doi.org/10.2478/geoca-2013-0008

Authors: RALUCA BINDIU, SORIN FILIPESCU, RAMONA BALC

Abstract: Late Cretaceous foraminiferal and calcareous nannoplankton assemblages from the northern part of the Tarcau Nappe, Hangu Formation in the northern Eastern Carpathians are documented in order to reconstruct paleoenvironmental settings and biostratigraphy. The foraminiferal assemblages are dominated by flysch-type agglutinated taxa suggesting bathyal environments, close to the calcite compensation depth (CCD), and mesotrophic to oligotrophic conditions. The morphogroup analyses display variations in tubular and infaunal morphotypes suggesting different levels of oxygenation and seafloor disturbance caused by currents. Reddish hemipelagites containing only agglutinated foraminifera (dominant infaunal forms) occurring in the middle part of the section suggest an increase of water depth and changes in redox conditions. Based on foraminifera, the deposits were assigned to planktonic Globotruncana ventricosa and agglutinated Caudammina gigantea Zones. The first occurrence of Uniplanarius trifidus and last occurrence of Reinhardtites anthophorus demonstrate the presence of Late Campanian UC15cTP–UC16/CC21–CC23 calcareous nannoplankton Zones. Foraminiferal and nannofossil assemblages in the red beds have a high potential for stratigraphic correlation on a regional scale.

Keywords: Eastern Carpathians, paleoecology, biostratigraphy, morphogroup analysis, red beds, calcareous nannoplankton, agglutinated foraminifera

Volume 64 no. 2 / April 2013

• ZITA BUKOVSKA, PETR JERABEK, ONDREJ LEXA, JIRI KONOPASEK, MARIAN JANAK, JAN KOSLER

  Kinematically unrelated C–S fabrics: an example of extensional shear band cleavage from the Veporic Unit (Western Carpathians)

• RALUCA BINDIU, SORIN FILIPESCU, RAMONA BALC

  Biostratigraphy and paleoenvironment of the Upper Cretaceous deposits in the northern Tarcau Nappe (Eastern Carpathians) based on foraminifera and calcareous nannoplankton

• KYRIAKI PIPERA, ANTONIS KORONEOS, TRIANTAFYLLOS SOLDATOS, ZOLTAN PECSKAY, GEORGIOS CHRISTOFIDES

  K/Ar mineral geochronology of the northern part of the Sithonia Plutonic Complex (Chalkidiki, Greece): implications for its thermal history and geodynamic interpretation

• ANETA AGNIESZKA ANCZKIEWICZ, JAN SRODON, MASSIMILIANO ZATTIN

  Thermal history of the Podhale Basin in the internal Western Carpathians from the perspective of apatite fission track analyses

• AMIR BIJAN YASREBI, PEYMAN AFZAL, , ANDY WETHERELT, PATRICK FOSTER, REZA ESFAHANIPOUR

  Correlation between geology and concentration-volume fractal models: significance for Cu and Mo mineralized zones separation in the Kahang porphyry deposit (Central Iran)

• DUSAN PLASIENKA, STEFAN JOZSA, PRZEMYSLAW GEDL, JOZEF MADZIN

  Short Communication Fault contact of the Pieniny Klippen Belt with the Central Carpathian Paleogene Basin (Western Carpathians): new data from a unique temporary exposure in Lutina village (Eastern Slovakia)