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Publisher © Czech Geological Survey, ISSN: 2336-5757 (online), 0514-8057 (print)

Tectonic deformation of trilobites in the Palaeozoic of the Barrandian

Pavel Röhlich

Geoscience Research Reports 46, 2013 (GRR for 2012), pages 195–198

Keywords: Ordovician, Silurian, Cambrian, Barrandian, area, tectonic deformation, trilobites

Map sheets: Zdice (12-32), Beroun (12-41), Brandýs nad Labem (13-13)

Full text (PDF, 0.9 MB)

Abstract

Tectonic deformation of trilobites by the Variscan folding is of crucial importance for determination ofthe tectonic regime, viz. for the deformation analysis. The preserved bilateral symmetry in deformed trilobites may serve as a proof of deformation by pure shear. The material from three sites in Central Bohemia (Cambrian, Ordovician and Silurian formations) has yielded indications of deformation by pure shear. The sites of deformation are confined to faulted zones striking NE-SW to ENE-WSW.