General Characteristics

County (administration): Liberec Region
District (town): Semily
Cadastre: Bítouchov u Semil
Map 1 : 50 000 (sheet No): 0332, 03324
Geological region: Lužice Pluton and Krkonoše-Jizera Massif; Krkonoše-Jizera crystalline complex
Accessibility: - no traffic restriction ( by car)
Excursion locality: yes
ID : 2858

Geology

Short characteristics of the site: Krkonoše-Jizera crystalline. Nature monument. Jizera River cuts through a small massif of the albite granite. Thus canyon with 40 m high rocky walls and pillars was formed. In the 19th century the gorge was artificially broadened and weir constructed as a water source for a local power station.
Regional geologic unit: Bohemian Massif - crystalline complex and pre-Variscian Palaeozoic - Lugicum - Krkonoše-Jizerské hory Mts.crystalline complex
Stratigraphy: paleozoikum
Subject: geomorphology, structural geology, petrology
Geological phenomenon: cliff, gorge
Genesis: magmatic, metamorphic (general metamorphism), volcanic
Rock: granite, greenschist, alkali-feldspar-trachyandesite, metagranitoid

Territorial conservation

Level of protection: Nature reserve
Additional information: See the Digital register of the Agency for Nature Conservation and Landscape Protection of the Czech Republic AOPK ČR
Protection of a geol. phenomenon: A - Protected Area (geology is important aspect of Biological declared Locality )
Part of the Geopark: Bohemian Paradise
Conflicts of interests: without conflicts

References

Mackovčin P., Sedláček M. a Kuncová J. (2002): Chráněná území ČR - Liberecko, Svazek III. Agentura ochrany přírody a krajiny ČR a EkoCentrum Brno, Praha, 331 s.. ; Rapprich et al. 2011: Základní geologická mapa České republiky 03-324. Turnov. Česká geologická služba. (s textovými vysvětlivkami).; Patočka, F., Fajst, M. & Kachlík, V., 2000. Mafic-felsic to mafic-ultramafic Early Palaeozoic magmatism of the West Sudetes (NE Bohemian Massif): the South Krkonoše Complex. Z. geol. Wiss., 28((1/2)), 177-210. ; Fediuk, F., 1962. Vulkanity železnobrodského krystalinika. Rozpr. Ústř. Úst. geol.,, 29, 116.

Elaboration and Updating

Elaborated by: Lorencová Markéta, 23.11.07
Updated by: Mrázová Štěpánka 27.10.09, Kachlík Václav 19.01.12, Kukal Zdeněk 04.12.17

Citation

The database Significant geological localities of the Czech Republic: 2858 [online]. Prague: Czech Geological Survey, 1998 [cit. 2024-04-26]. Available from: http:// lokality.geology.cz/2858.

Location in map: