General Characteristics

County (administration): Hradec Králové Region
District (town): Náchod
Cadastre: Vernéřovice
Map 1 : 50 000 (sheet No): 0431, 04314
Geological region: Czech Cretaceous Basin - E-Bohemian and W-Moravian Cretaceous; Chrudim Cretaceous; Králíky Furrow; Police Basin
Accessibility: - passable footpath
Technical object: guarry
Excursion locality: yes
ID : 1525

Geology

Short characteristics of the site: Abandoned quarry about 200 m northwest from train stop Bohdašín, opened at the edge of Mračný vrch Ridge. Unique example of Cretaceous transgression over Triassic. Whitish medium-to coarse grained kaolinitic feldspathic sandstones of Triassic Bohdašín Formation are in the lower part of the outcrop. They contain small pebbly admixture. They are unconformably overlied by transgressive deposits of Upper Cretaceous (Korycany Member, Cenomanian). About 20 - 30 cm thick layer of glauconitic conglomerate is at the base, overlying by mostly medium grained massive glauconitic quartzose sandstones with rectangular jointing. Basal plane of Cretaceous is uneven, erosional, sharp. Rare fragments of eroded Triassic sandstones are locally at the base.
Regional geologic unit: Bohemian Massif - superficial deposits and post-Variscian magmatites - Upper Carboniferous and Permian - Lugic Late Palaeozoicum (including Triassic deposits), Bohemian Massif - superficial deposits and post-Variscian magmatites - Cretaceous - Czech Cretaceous Basin
Stratigraphy: mezozoikum - trias
Subject: stratigraphy, sedimentology
Geological phenomenon: transgression, lithological boundary
Genesis: sedimentary
Rock: sandstone, conglomerate

Territorial conservation

Level of protection: Nature monument in Protected landscape area
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)
Part of LEPA (Large-size especially protected areas): CHKO (Protected landscape area) - Broumovsko
Part of the Geopark: Broumovsko
Conflicts of interests: without conflicts

References

Tásler R., Kotlář J. (1987): Geologie chráněné krajinné oblasti Broumovsko. - MS. str. 64 + 4 přílohy. Archiv CHKO Broumovsko. Police nad Metují. Vítek J. (1986): Geomorfologie navrhovaná chráněné krajinné oblasti Broumovsko. MS. str.68 + 35 příloh. Archiv CHKO Broumovsko. Police nad Metují. Ziegler V. (1993): Hodnocení křídových lokalit na území CHKO Broumovsko.- MS str. 20. Archiv CHKO Broumovsko. Police nad Metují.

Elaboration and Updating

Elaborated by: Plná Věra, 05.11.03
Updated by: Gürtlerová Pavla 15.10.04, Gürtlerová Pavla 16.11.09, Gürtlerová Pavla 13.05.18

Citation

The database Significant geological localities of the Czech Republic: 1525 [online]. Prague: Czech Geological Survey, 1998 [cit. 2024-04-19]. Available from: http:// lokality.geology.cz/1525.

Location in map: