International Geological Journal - Official Journal of the Carpathian-Balkan Geological Association

REEF-MICROENCRUSTERS ASSOCIATION LITHOCODIUM AGGREGATUM–BACINELLA IRREGULARIS FROM THE CIESZYN LIMESTONE (TITHONIAN–BERRIASIAN) OF THE OUTER WESTERN CARPATHIANS (POLAND)

Pages: 449 - 456

Authors: JACEK MATYSZKIEWICZ, TADEUSZ SLOMKA

Abstract: Debris-flow sediments belonging to the Upper Cieszyn Limestone (Berriasian) are exposed near Żywiec (Polish part of the Outer Western Carpathians). The debris-flow sediments include clasts of bioclastic limestones (boundstones) derived from both microbial-sponge mud mounds and coral-algal reefs. The microencruster assemblage Lithocodium aggregatum–Bacinella irregularis has been found in clasts from coral-algal reefs. This assemblage unequivocally proves the presence of shallowing-upward reefal sequences on the Silesian Ridge. The development of the coral-algal reefs was probably a consequence of intense aggradational growth of microbolite-sponge mud mounds, accompanied by intense uplift movements of the neo-Cimmerian phase.

Keywords: Outer Western Carpathians, Cieszyn Limestone, coral-algal reef, microbial-sponge facies, Lithocodium aggregatum, Bacinella irregularis

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