General Characteristics

County (administration): Hradec Králové Region
District (town): Trutnov
Cadastre: Jánské Lázně - Černá hora v Krkonoších
Map 1 : 50 000 (sheet No): 0342, 03423
Geological region: Lužice Pluton and Krkonoše-Jizera Massif; Krkonoše-Jizera crystalline complex
Accessibility: - passable footpath
ID : 3469

Geology

Short characteristics of the site: Krkonoše-Jizera Crystalline Complex. Outcrop on the summit of Modré kameny (Blue Rocks) elevation formed of metaquartzite with great amount of muscovite flakes. Very distinct foliation with crenulation folds containing veinlets of whitish quartz. Nearby contact of described metaquartzite with Krkonoše orthogneiss.
Regional geologic unit: Bohemian Massif - crystalline complex and pre-Variscian Palaeozoic - Lugicum - Krkonoše-Jizerské hory Mts.crystalline complex
Stratigraphy: paleozoikum
Subject: geology, structural geology
Geological phenomenon: fold, lithological boundary, deformation fabrics
Genesis: metamorphic (general metamorphism), tectonic
Rock: qurtzite, orthogneiss

Territorial conservation

Level of protection: Interesting geological localities in National park
Protection of a geol. phenomenon: C - Geological phenomenon is the reason for a registration in the database of CGS
Part of LEPA (Large-size especially protected areas): NP (National park) - Krkonoše
Conflicts of interests: without conflicts

References

Martínek, K. ed. (2012): Vysvětlivky k základní geologické mapě České republiky 1:25 000, list Svoboda nad Úpou 03-423.

Elaboration and Updating

Elaborated by: Martínek Karel, 08.03.12
Updated by: Kukal Zdeněk 26.11.12, Martínek Karel 14.02.13

Citation

The database Significant geological localities of the Czech Republic: 3469 [online]. Prague: Czech Geological Survey, 1998 [cit. 2024-04-20]. Available from: http:// lokality.geology.cz/3469.

Location in map: