Nucleation and amplification of doubly-plunging anticlines: the Butkov pericline case study (Manín Unit, Western Carpathians)

The Manín Unit represents a transitional tectonic element between the Central Western Carpathians and the Pieniny Klippen Belt. The overall map-view structure of the Manín Unit is dominated by elliptical antiforms composed of comparatively competent Jurassic and Lower Cretaceous strata, surrounded b...

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Bibliographic Details
Published in:Geologica Carpathica 2018-08, Vol.69 (4), p.365-381
Main Authors: Plašienka, Dušan, Šimonová, Viera, Bučová, Jana
Format: Article
Language:English
Subjects:
Anticlines
Butkov pericline
Case studies
Cretaceous
Deformation
Ecological succession
Jurassic
Limestone
Manín Unit
Multilayers
noncylindrical macrofolds
Pieniny Klippen Belt
Sandstone
structural analysis
Wavelength
Western Carpathians
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Summary:The Manín Unit represents a transitional tectonic element between the Central Western Carpathians and the Pieniny Klippen Belt. The overall map-view structure of the Manín Unit is dominated by elliptical antiforms composed of comparatively competent Jurassic and Lower Cretaceous strata, surrounded by soft Upper Cretaceous shales, marls and sandstones. During layer-parallel shortening, the Manín sedimentary succession behaved as a multilayer reinforced by a variously thick rigid layer of massive Urgonian limestone. The multilayer deformed by flexural slip folding, but the fold wavelength was controlled by the rigid layer undergoing buckling. It is inferred that, besides the lateral thickness differences in the rigid layer, development of brachyfolds and particularly periclines such as the Butkov fold also resulted from the interference of two perpendicular macroscopic fold systems.
ISSN:1336-8052
1335-0552
1336-8052
DOI:10.1515/geoca-2018-0022