General Characteristics

County (administration): Hradec Králové Region
District (town): Jičín
Cadastre: Vidochov
Map 1 : 50 000 (sheet No): 0343, 03432
Geological region: Permo-Carboniferous of the Krkonoše-piedmont and Lower Silesian basins
Accessibility: - no traffic restriction ( by car)
Technical object: guarry
Excursion locality: yes
ID : 3904

Geology

Short characteristics of the site: Abandoned, partly flooded quarry, exposing a melaphyre body. It consists of volcanic breccia and scoria-like vesicular lavas with jasper veinlets. The vesicles are filled by secondary chlorite, chalcedony and jasper. One of quarry parts exposes blocks enclosed in contact chert. This siliceous rock occurs also on a base of lava and brecciated lava with silicite forms a natural bridge (rock gate). Nearby relics of mine workings occur, fixed for gemstone exploitation. The structure of volcanites and pyroclastics clearly indicate a freatomagmatic character of volcanic activity. Lower Permian of the Krkonoše Piedmont Basin.
Regional geologic unit: Bohemian Massif - superficial deposits and post-Variscian magmatites - Upper Carboniferous and Permian - Permocarboniferous Volcanits
Stratigraphy: paleozoikum - perm - spodní perm
Subject: geology, volcanology
Geological phenomenon: lava flow, volcaniclastic deposits, rock arch
Genesis: volcanic , weathering
Rock: breccia, hornfels, basaltic-andesite

Territorial conservation

Level of protection: Registered geological localities suggested for protection
Protection of a geol. phenomenon: B - Geological phenomenon is the reason for a recommendation to the protection
Part of the Geopark: Bohemian Paradise
Conflicts of interests: collection, private property

References

Stárková M.. et.al. (2016): Vysvětlivky k základni geologické mapě ČR 1 : 25 000 list 03-432 Nová Paka. MS archiv ČGS.

Elaboration and Updating

Elaborated by: Tasáryová Zuzana, 11.01.16
Updated by: Gürtlerová Pavla 27.07.16, Stárková Marcela 13.11.17, Kukal Zdeněk 14.02.18

Citation

The database Significant geological localities of the Czech Republic: 3904 [online]. Prague: Czech Geological Survey, 1998 [cit. 2024-04-26]. Available from: http:// lokality.geology.cz/3904.

Location in map: