County (administration): Liberec Region
District (town): Semily
Map 1 : 50 000 (sheet No): 0334, 03342
Geological region: Czech Cretaceous Basin - Labe & Čáslav Cretaceous; Cretaceous of the Dlouhá mez
Accessibility: - passable footpath
Excursion locality: yes
ID : 3441
Short characteristics of the site: Bohemian Cretaceous Basin. System of water springs in the area of the Hrubá Skála castellated sandstone rocks. These stratal springs are bound to the boudary of claystones and sandstone layers of the Teplice Formation. This spring field feeds water resources of traditional spa area. Position of springs was partly affected by landslides and so these spills occur along a front of landslide bodies. This area is extremely important from the hydrogeological and geomorphological viewpoints. This locality is situated in the Geopark and Protected Landscape Area Český ráj - the Bohemian Paradise.
Regional geologic unit: Bohemian Massif - superficial deposits and post-Variscian magmatites - Cretaceous - Czech Cretaceous Basin
Stratigraphy: mezozoikum - křída - svrchní křída - coniak
Subject: hydrogeology, engineering geology
Geological phenomenon: spring, river source, landslide
Genesis: aquatic (water activity), gravitational
Rock: sandstone, claystone
Level of protection: Registred geological localities suggested to protection in Protected landscape area
Protection of a geol. phenomenon: B - Geological phenomenon is the reason for a recommendation to the protection
Part of LEPA (Large-size especially protected areas): CHKO (Protected landscape area) - Český ráj
Part of the Geopark: Bohemian Paradise
Conflicts of interests: ground instability
Čech, S., et.al. (2011): Základní geologická mapa České republiky 1 : 25 000 s Vysvětlivkami 03-342 Rovensko pod Troskami. - Česká geologická služba. Praha..
Elaboration and Updating
Elaborated by: Čech Stanislav, 15.02.12
Updated by: Kukal Zdeněk 26.11.12, Kukal Zdeněk 21.12.17
The database Significant geological localities of the Czech Republic: 3441 [online]. Prague: Czech Geological Survey, 1998 [cit. 2023-12-04]. Available from: http:// lokality.geology.cz/3441.
Location in map:
Links to neighbouring localities within 2 km radius are available on mouse click in the map window.