General Characteristics

County (administration): Central Bohemia Region
District (town): Rakovník
Cadastre: Sýkořice
Map 1 : 50 000 (sheet No): 1232, 12322
Geological region: Barrandian Proterozoic; Tisá and Čistá-Jesenice massifs
Accessibility: - entry permit for car necessary
ID : 3892

Geology

Short characteristics of the site: The porphyry vein within sedimentary sequence of Neoproterozoic rocks. This subvolcanic rock is formed by coarse grained porphyry with quartz and feldspar phenocrysts. Nearby carbonate water source can be found, which cements and cosolidates rhyolite scree. This locality situated in the Protected Landscape Area Křivoklátsko is recommnded for protection.
Regional geologic unit: Bohemian Massif - crystalline complex and pre-Variscian Palaeozoic - Bohemicum (Central Bohemian region) - Barrandien
Stratigraphy: paleozoikum - kambrium
Subject: petrology, volcanology
Geological phenomenon: characteristic rock
Genesis: volcanic
Rock: rhyolite

Territorial conservation

Level of protection: Registred geological localities suggested to protection in Protected landscape area
Protection of a geol. phenomenon: B - Geological phenomenon is the reason for a recommendation to the protection
Part of LEPA (Large-size especially protected areas): CHKO (Protected landscape area) - Křivoklátsko
Part of the Geopark: Barrandien
Conflicts of interests: without conflicts

References

Vorel, T., red. (2012): Základní geologická mapa České republiky 1 : 25 000 s Vysvětlivkami 12-322 Hudlice. Česká geologická služba. Praha.

Elaboration and Updating

Elaborated by: Vorel Tomáš, 15.10.15
Updated by: Vorel Tomáš 05.11.15, Kukal Zdeněk 28.11.17

Citation

The database Significant geological localities of the Czech Republic: 3892 [online]. Prague: Czech Geological Survey, 1998 [cit. 2024-04-19]. Available from: http:// lokality.geology.cz/3892.

Location in map: