Kozákov Hill

Radostná pod Kozákovem.

Kozákov Hill (744 m a.s.l.) is a geologically and mineralogically significant site with many outcrops on its slopes. It belongs to the geomorphological unit called Ještědsko-kozákovský hřbet (Ještěd-Kozákov Ridge). Its geological structure is composed of rocks of three different periods: the Permian, Cretaceous and the Neogene. Permian andesitoids (melaphyres) are the most widespread rock, now exposed especially in the Votrubcův Quarry on the southern hillside. Precious varieties of silica minerals (e.g., agate, jasper, chalcedony, amethyst, kascholong, smoky quartz) and other minerals (zeolites, calcite etc.) form veins and amygdules. On the western hillside, Permian andesitoids are covered by quartzose sandstones of the Peruc and Korycany Members with floral and bivalve fossils. Outcrops of these rocks, forming a fault-bounded bock, reach almost to the summit. They host remarkable, archeologically significant pseudokarst caves of Babí pec and Kudrnáčova pec, and a rock-carved chamber called Drábovna. Below lies the canyon-like gorge of Moon Valley (Měsíční údolí). The summit of Kozákov Hill and a part of its eastern and northern slopes are formed by Neogene basalt rich in peridotite xenoliths (so-called olivine balls). Kozákov Hill as a mineralogical site was known already to artists at the times of Charles IV, who made use especially of local jasper. These jasper-made decorations and reliefs on artefacts can be found in collections across the whole of Europe.




Login Cookies