Rock outcrop.

The cliff above the Jizera River is composed of amphibole diorite emplaced into light muscovite alkali-feldspar granites of the Železný Brod Crystalline Complex. The original contact between the two bodies was obscured by strong deformations during the Variscan orogeny. The original amphibole diorites were turned into banded amphibolic meta-diorites with abundant epidote and chlorite, and the granitic rocks were locally turned into phyllonites – intricately folded fine-grained rocks dominated by sericite. Both rock types were subjected to zircon dating: they display similar ages of 541 million years, which probably makes them the oldest rocks in the Geopark.


04_ Bitouchov, author: Jan Mertlík

04_ Bitouchov

Login Cookies