Rozwój basenu magurskiego w górnej kredzie i paleogenie
Abstract
EVOLUTION OF THE MAGURA BASIN IN LATE CRETACEOUS AND PALEOGENE
Summary
The Magura Nappe is the largest tectonic unit of the Western Carpathians, linked with Rheno-Danubian flysch of the Eastern Alps. During tectonic movements, the Magura nappe has been completely uprooted from its substratum along ductile Upper Cretaceous rocks. Older deposits are known only from that part of the basin which was incorporated into the Pieniny Klippen Belt. In sedimentary evolution of the Magura basin we can distinguish three different periods: the Middle Jurassic-Albian long-lasting (96 m.y), extensional period of the pelagic deposition, the Cenomanian - Campanian (23 m.y) period ofhemipelagic deposition and the Maastrichtian - Early Oligocene (40 m.y), mainly compressional period of turbiditic sedimentation. During Eocene time, gradual shifting of coarse-clastic deposition from the south to the north took place. It was connected with development of two large submarine fans, partially superimposed one upon another. The progradation of these fans can be related to shortening of the Magura basin and development of accretionary prism(?).
Summary
The Magura Nappe is the largest tectonic unit of the Western Carpathians, linked with Rheno-Danubian flysch of the Eastern Alps. During tectonic movements, the Magura nappe has been completely uprooted from its substratum along ductile Upper Cretaceous rocks. Older deposits are known only from that part of the basin which was incorporated into the Pieniny Klippen Belt. In sedimentary evolution of the Magura basin we can distinguish three different periods: the Middle Jurassic-Albian long-lasting (96 m.y), extensional period of the pelagic deposition, the Cenomanian - Campanian (23 m.y) period ofhemipelagic deposition and the Maastrichtian - Early Oligocene (40 m.y), mainly compressional period of turbiditic sedimentation. During Eocene time, gradual shifting of coarse-clastic deposition from the south to the north took place. It was connected with development of two large submarine fans, partially superimposed one upon another. The progradation of these fans can be related to shortening of the Magura basin and development of accretionary prism(?).