Claudia BELDEAN¹, Sorin FILIPESCU¹ & Ramona BĂLC^2
1Babeş-Bolyai University, Department of Geology, Kogălniceanu 1, 400084, Cluj-Napoca, Romania, beldean_claudia@yahoo.com, sorin.filipescu@ubbcluj.ro
²Babeş-Bolyai University, Faculty of Environmental Sciences and Engineering, Fântânele 30, 400294, Cluj-Napoca, Romania, ramonabalc@yahoo.com

PALEOENVIRONMENTAL AND BIOSTRATIGRAPHIC DATA FOR THE EARLY MIOCENE OF THE NORTH-WESTERN TRANSYLVANIAN BASIN BASED ON PLANKTONIC FORAMINIFERA

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Early Miocene planktonic foraminifera were investigated from the turbidites of the Hida Formation in the north-western Transylvanian Basin. At least three distinct acmes of planktonic foraminifera have been revealed. Although the particular assemblages can be hardly calibrated to the standard biozones, they are very distinct and can be attached to relative sea-level fluctuations, this way showing potential for regional correlations. The possible Indo-Pacific affiliation of the planktonic assemblages proves the wide connections of the Paratethyan area to the east during the Early Miocene. Calcareous nannoplankton assemblages identified in the Hida Formation are characteristic for the entire Early Miocene.