ASGP (2006), vol. 76: 197-214
BENTONITIZED TUFFITES IN THE LOWER EOCENE DEPOSITS OF THE SUBSILESIAN UNIT (WESTERN OUTER CARPATHIANS, POLAND): LITHOLOGY, STRATIGRAPHIC POSITION AND MINERAL COMPOSITION
Marek CIESZKOWSKI (1), Jan ŚRODOŃ (2), Anna WAŚKOWSKA-OLIWA (3) & Tadeusz LEŚNIAK (3)
1) Jagiellonian University, Institute of Geological Sciences, Oleandry 2a, 30-063 Kraków Poland, e-mail: mark at ing.uj.edu.pl
2) Institute of Geological Sciences, Polish Academy of Sciences, Senacka 1, 31-002 Kraków, Poland, e-mail: ndsrodon at cyf-kr.edu.pl
3) University of Science and Technology - AGH, Faculty of Geology, Geophysics and Environmental Protection, Department of General and Mathematical Geology Mickiewicza 30, 30-059 Kraków, Poland; e-mail: tlesniak at geolog.geol.agh.edu.pl; oliwa at geol.agh.edu.pl
Cieszkowski, M., Środoń, J., Waśkowska-Oliwa, A. & Leśniak, T., 2006. Bentonitized tuffites in the Lower Eocene deposits of the Subsilesian Unit (Western Outer Carpathians, Poland): lithology, stratigraphic position and mineral composition. Annales Societatis Geologorum Poloniae, 76: 197-214.
Abstract: New occurrences of bentonitized tuffites were described from numerous outcrops of the Lower Eocene flysch rocks of the Subsilesian Unit. These deposits crop out in the Żywiec tectonic window and in the tectonic windows of the Lanckorona - Żegocina Structural Zone. The bentonitized tuffites, composed of almost pure dioctahedral motmorillonite, form numerous thin layers and laminae, only occasionally exceeding 5 cm. The age of the tuffites is estimated as the Early Eocene (Glomospira div. sp. and Saccamminoides carpathicus zones) on the basis of foraminiferal assemblages. They occur in the upper part of green shales and in the lower part of the Lipowa beds that consist mainly of muddy turbidites represented by green or green-brownish shales with rare intercalations of sandstones. The sedimentary sequences with the tuffite intercalations form a lithostratigraphic level in the Subsilesian Unit called in the present paper "the Glichów Tuffite Horizon". This tuffite horizon could probably be correlated with deposits of similar age containing tuffites which are known from the Magura, Silesian and Skole nappes.
