The Frasnian/Famennian transition: the sequence of events in southern Poland and its

Marek Narkiewicz, Antoni Hoffman

Abstract


Detailed analysis of the facies sequences on the Late Devonian shelf in southern Poland allows for a reconstruction of geological events at the Frasnian/Famennian transition. This reconstruction can be extrapolated on the global scale· via conodont zonation. Rapid regression occurred in the late Frasnian Lower gigas Zone and was shortly followed by a transgressive pulse. These events - perhaps glacieustatic in nature - resulted in termination of the growth of Late Devonian reef complexes. A crisis in carbonate production occurred at the Frasnian/Famennian boundary and was roughly associated in time with extinction of pelagic faunas.


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