General Characteristics

County (administration): Liberec Region
District (town): Semily
Cadastre: Koberovy
Map 1 : 50 000 (sheet No): 0332, 03324
Geological region: Czech Cretaceous Basin - Labe & Čáslav Cretaceous; Cretaceous of the Dlouhá mez
Accessibility: - no traffic restriction ( by car)
Technical object: guarry
ID : 3204

Geology

Short characteristics of the site: Neovolcanic rocks of the Bohemian Massif. Bohemian Cretaceous Basin. Small outcrops and abandoned quarry on a distinct elevation. They expose pyroclastic rocks consisting of sharp edged basanite fragments. It originated by freatomagmatic eruption of the Surtsey type. Now it represents only a relic of volcanic cone. Its Pliocene age is probable. Radiometric dating was not successful because of postvolcanic changes. This locality is situated in the Protected Landscape Area Český ráj - the Bohemian Paradise.
Regional geologic unit: Bohemian Massif - superficial deposits and post-Variscian magmatites - Tertiary - Dispersed Alcalic volcanits
Stratigraphy: kenozoikum - terciér (paleogén - neogén)
Subject: volcanology
Geological phenomenon: volcaniclastic deposits
Genesis: volcanic
Rock: pyroclastic deposits

Territorial conservation

Level of protection: Interesting geological localities in Protected landscape area
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): CHKO (Protected landscape area) - Český ráj
Part of the Geopark: Bohemian Paradise
Conflicts of interests: without conflicts

References

Raprrich, V., red. (2011): Základní geologická mapa České republiky 1 : 25 000 s Vysvětlivkami 03-324 Turnov. - Česká geologická služba. Praha.

Elaboration and Updating

Elaborated by: Rapprich Vladislav, 14.07.10
Updated by: Rapprich Vladislav 31.08.12, Kukal Zdeněk 21.12.17

Citation

The database Significant geological localities of the Czech Republic: 3204 [online]. Prague: Czech Geological Survey, 1998 [cit. 2023-12-08]. Available from: http:// lokality.geology.cz/3204.

Location in map: