General Characteristics

County (administration): Central Bohemia Region
District (town): Mladá Boleslav
Cadastre: Horní Stakory, Chudoplesy, Kosmonosy
Map 1 : 50 000 (sheet No): 0333, 03334
Geological region: Czech Cretaceous Basin - Jizera Cretaceous & Cretaceous of the lower section of Labe River, Ploučnice, Kamenice and the Děčínský Sněžník Mt.
Accessibility: - no traffic restriction ( by car)
ID : 2770

Geology

Short characteristics of the site: The Bohemian Cretaceous Basin - Tertiary volcanics. Two volcanic chimneys of olivinic nephelinite and chimney breccia, uncovered by erosion of Cretaceous deposits, mainly marlstones. Volcanic massif is cut by numerous fractures and affected by old quarrying. Volcanic rocks exhibit interesting structures, such as columnar jointing and brecciation. Some mineral species were found on the contact of nephelinite and marlstone.
Regional geologic unit: Bohemian Massif - superficial deposits and post-Variscian magmatites - Tertiary - Basins under Krušné hory Mts.and adjoining volcanic uplands
Stratigraphy: kenozoikum - terciér (paleogén - neogén)
Subject: volcanology, mineralogy, mining and mining impacts, engineering geology, botany, petrology
Geological phenomenon: landslide, intrusion
Genesis: volcanic , sedimentary, gravitational, anthropogenic (anthropogenic activity)
Rock: basaltoid (basaltic-rock), marlstone, tuff, tuff

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 (declared as Geological and Biological Locality)
Conflicts of interests: ground instability

References

Ložek V., Kubíková J., Spryňar P. a kol.(2005):Střední Čechy. In: Mackovčin P. a Sedláček M. (eds.):Chráněná území ČR,svazek XIII. Agentura ochrany přírody a krajiny Brno,Praha str. 350

Elaboration and Updating

Elaborated by: Gürtlerová Pavla, 23.05.07
Updated by: Gürtlerová Pavla 29.05.07, Valečka Jaroslav 28.08.09

Citation

The database Significant geological localities of the Czech Republic: 2770 [online]. Prague: Czech Geological Survey, 1998 [cit. 2024-04-16]. Available from: http:// lokality.geology.cz/2770.

Location in map: