Bechlejovice fault field near Děčín (North Bohemia); the deepest subsided tectonic segments of the Bohemian Cretaceous Basin


Jaroslav Valečka

Geoscience Research Reports 43, 2010 (GRR for 2009), pages 74–77
Map sheets: Děčín (02-23)

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Geological cross-sections based on the geological mapping and borehole data allowed to characterize extremely subsided tectonic blocks near Děčín (northern Bohemia). The blocks are arranged in a fault field, called after the village of Bechlejovice. The Fault Field is elongated in the N-S direction, related to the Děčín Fault Field, and its faults were found to dislocate Cretaceous sediments, Paleogene sandstones as well as the Tertiary volcanosedimentary complex. This fault field lies on the NW flank of the flat Benešov syncline. It was formed within at least two tectonic phases, first occurring before the Paleogene sedimentation and second one after the formation of the volcanosedimentary complex. The southernmost tectonic block of this field is the deepest subsided block in the whole Bohemian Cretaceous Basin, with base of the Cretaceous sediments at the altitude -750 m.