General Characteristics

County (administration): Central Bohemia Region
District (town): Rakovník
Cadastre: Hředle, Třeboc
Map 1 : 50 000 (sheet No): 1214, 12141
Geological region: Czech Cretaceous Basin - Velim, Praha, Roudnice and Ohře Cretaceous
Accessibility: - no traffic restriction ( by car)
Excursion locality: yes
ID : 2808

Geology

Short characteristics of the site: An outcrop in the slope N of Hředle, Rakovník area. It shows a classic stratigraphic section in the Peruc-Korycany and Bílá hora formations of the Bohemian Cretaceous Basin, described by Frič and Bayer (1901) already. It is underlain by the Permo-Carboniferous Líně Formation (Stephanian C). Spongilitic marlstones of the Bílá hora Formation are now exploited by the Spongilit Co. and show many cavities of enigmatic origin. A good example of marlstone in the Džbán area.
Regional geologic unit: Bohemian Massif - superficial deposits and post-Variscian magmatites - Cretaceous - Czech Cretaceous Basin
Stratigraphy: mezozoikum - křída - svrchní křída - cenoman, proterozoikum
Subject: geology, stratigraphy, economic geology
Geological phenomenon: lithological boundary
Genesis: sedimentary
Rock: opuka (aranaceous marlstone), sandstone

Territorial conservation

Level of protection: Registered geological localities suggested for protection
Protection of a geol. phenomenon: C - Geological phenomenon is the reason for a registration in the database of CGS
Conflicts of interests: without conflicts

References

Frič, A. - Bayer, E. (1901): Studien im Gebiete der Böhmischen Kreideformation. Palaeontologische Untersuchungen der einzelnen Schichten. Perucer Schichten.- Arch. naturwiss.Landes-Durchforsch. Böhm., XI, 2. Prag. Zelenka, P.(2002): Džbánská opuka - významný a typický kámen Rakovnicka - Věst. Mus. Spol. /Rakovník/, XXXX, 27 - 28.

Elaboration and Updating

Elaborated by: Zelenka Přemysl, 18.04.07
Updated by: Zelenka Přemysl 16.09.09, Kukal Zdeněk 18.12.17, Vajskebrová Markéta 14.07.21

Citation

The database Significant geological localities of the Czech Republic: 2808 [online]. Prague: Czech Geological Survey, 1998 [cit. 2024-05-06]. Available from: http:// lokality.geology.cz/2808.

Location in map: