ASGP (2016), vol. 86: 415–427
THE SOKOLISKA LIMESTONE, A NEW REGIONAL MARKER HORIZON OF COCCOLITH LAMINITES IN THE OLIGOCENE OF THE OUTER CARPATHIANS: DIAGNOSTIC FEATURES AND STRATIGRAPHIC POSITION
Agnieszka CIUREJ (1, 2) & Grzegorz HACZEWSKI (2)
1) Polish Academy of Sciences. Institute of Geological Sciences, Research Centre in Cracow, Senacka 1, 31-002 Kraków, Poland; e-mail: ndciurej at cyf-kr.edu.pl
2) Institute of Geography, Pedagogical University of Cracow, Podchorążych 2, 30-084 Kraków, Poland; e-mail: sghaczew at interia.pl
Ciurej, A. & Haczewski, G. 2016. The Sokoliska Limestone, a new regional marker horizon of coccolith laminites in the Oligocene of the Outer Carpathians: diagnostic features and stratigraphic position. Annales Societatis Geologorum Poloniae, 86: 415–427.
Abstract: Isochronous horizons of pelagic coccolith limestones are important regional stratigraphic markers in the Oligocene sequences of the Outer Carpathians. Three widely recognized limestone horizons are the Tylawa Limestones, the Jasło Limestone and the Zagórz Limestone horizons. Another regional marker horizon is described here, the Sokoliska Limestone horizon, situated between the Jasło Limestone and Zagórz Limestone horizons in the nannoplankton NP24 Zone. Its lithologic characteristics allow it to be distinguished from the other limestones, especially under the optical microscope. Its dark laminae are greatly enriched in non-calcareous material. The limestone contains tests of planktonic foraminifers, but these are much less abundant than in the Jasło Limestone. The boundaries with the marly shales above and below are often more gradational than is the case with the other limestone horizons. The Sokoliska Limestone has been recognized over a distance of ca. 550 km in the Skole (Tarcău) and Silesian units of the eastern and northern parts of the Outer Carpathians. Four sections of the Sokoliska Limestone horizon in the Polish and Romanian Carpathians are described; the exposure in the Sokoliska cliff of the Solinka River at Bukowiec was selected as the reference locality.
Manuscript received 30 November 2015, accepted 15 November 2016
