Zapis δ13C w osadach pogranicza dewonu i karbonu w południowej części Gór Świętokrzyskich

Abstract

Carbon isotope record in sediments of the Devonian-Carboniferous boundary in the southern Holy Cross Mountains.S u m m a r y. The δ13C curve is presented for the Devonian-Carboniferous boundary (from the expansa to sandbergi conodont zones) outcropped at Kowala in the western Holy Cross Mountains, Poland. A positive carbon excursion is reported within micritic limestones corresponding to the upper (or even uppermost middle) praesulcata conodont zone, which coincides with the glacio-eustatic sea-level drop. The positive shift in the carbon isotope signature was preceded by a mass extinction of the ostracode, conodont and ammonite fauna coeval with the Hangenberg Event.