Publisher © Czech Geological Survey, ISSN: 2336-5757 (online), 0514-8057 (print)
Slope deformations and granite tectonics in the Smědavská hora Mt., Jizerské hory Mts
Abstract
At the beginning of August 2010, intensive rainfalls caused many flash floods in Liberec region in the northern part of the Czech Republic. On the slopes of Smědavská hora Mt. (Jizerské hory Mts.), Quaternary sediments were filled with water which resulted in the loss of slope stability, slope deformations, and formation of stone-shoulder streams. The affected area is built up by medium-grained strongly porphyritic biotite granite called Jizera type granite. The granite massif contains a joint system and fault zones, both steep and trending NW-SE and NE-SW, and a flat-lying joint plane, which is a prerequisite for the development of slope deformations. The dislocations are often filled with aplite, leucocratic fine-grained granite or Tertiary basanite.
