General Characteristics

County (administration): Ústí nad Labem Region
District (town): Děčín
Cadastre: Dobkovice, Roztoky n.Labem
Map 1 : 50 000 (sheet No): 0241, 02412
Geological region: Neovolcanics of the České středohoří Mts.
ID : 151

Geology

Short characteristics of the site: Roztoky (Rongstok) subvolcanic structure represents a unique phenomenon. It was described as an intrusive apparatus of a carbonatite volcanic activity. Alkaline metasomatose (phenitisation) played an important role in the formation of these rocks. Reference locality for this type of volcanism.
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, petrology, structural geology

Territorial conservation

Level of protection: Registred geological localities suggested to protection in Protected landscape area
Part of LEPA (Large-size especially protected areas): CHKO (Protected landscape area) - České středohoří
Conflicts of interests: recreation

References

Hibsch, J. E. (1899): Geologische Karte des Böhmischen Mittelgebirges, Blat II (Rongstock - Bodenbach), nebst Erläuterungen. - A. Hölder. Wien. Kopecký, L. (1987) (ed.): Proceedings of the first seminar on Carbonatites and Alkaline rocks of the Bohemian Masiv and ambient regions. - Ústřední ústav geologický, Praha. Kopecký, L. (1987-8): Mladý vulkanismus Českého masivu. - Geol. Hydrometalurg. Uranu, ročník 11/12.

Elaboration and Updating

Elaborated by: Cajz Vladimír, 29.11.93

Citation

The database Significant geological localities of the Czech Republic: 151 [online]. Prague: Czech Geological Survey, 1998 [cit. 2024-04-23]. Available from: http:// lokality.geology.cz/151.

Location in map: