Acta Palaeontologica Polonica No. 1-4 1982 [antikvár]

JANINA SZCZECHURAMIDDLE MIOCENE FORAMINIFERAL BIOCHRONOLOGY ANDECOLOGY OF SE POLANDSZCZECHURA, J.: Middle Miocene foraminiferal biochronology and ecology of SE Poland. Acta Palaeont. Polonica, 27, 14, 344, 1982. Issued January 1983.Middle and Late Miocene (Late Badenian and Sarmatian) foraminifera of the epicontinental deposits of SE Poland (Roztocze area) have been examined. These deposits, referred to the Late Badenian are correlated with N13N14 standard biostratigraphic zones, based on planktonic foraminifera. Sarmatian, therefore, especially its deeper water deposits, appears to represent younger zones. Changes in water depth appeared to control distribution of benthonic forms, whereas climatic changes and water depth controlled distribution of planktonic forms. The Middle/Late Badenian boundary probably represents an ecostratigraphic event. A correlation is suggested relating the Middle Miocene deposits of the Roztocze area with those of the Polish Fore-Carpathian Depression. Bolboforma badenensis sp. n., a planktonic form of uncertain taxonomic affinity is described.Key words: Foraminifera, problematic planktonic form, Miocene, Poland, biochronology, ecology, taxonomy.Janina Szczechura, Zaklad Paleobiologii, Polska Akadémia Nauk, Al. Zwirki i Wigury 93, 02-089 Warszawa, Poland. Received: January, 1981.ACKNOWLEDGEMENTSThe samples from which the microfauna has been recovered were made available through courtesy of Dr. T. Musial of the University of Warsaw's Institute of Geology and Dr. G. Jakubowski of the Polish Academy of Sciences* Museum of the Earth in Warsaw who also helped in sampling the profile at Trz^siny. The nannoplankton of two samples from the Trz^-siny profile was identified by Professor E. Martini of the Geological-Pale-ontological Institute of the University of Frankfurt on the Main, the Federal Republic of Germany. Professor I. Premoli Silva of the University of Milan, Paleontological Institute, Italy; Dr. E. Luczkowska and Dr. T. Smigielska, both of the Academy of Mining and Metallurgy, Institute of Regional Geology and Coal Deposits, Dept. of Paleontology and