Třebnuška
General Characteristics
County (administration):
Plzeňský kraj
District (town):
Rokycany
Village:
Zbiroh
Cadastre:
Třebnuška
Map sheets:
12-32 Zdice, 12-323 Podmokly
Accessibility:
special entry permit necessary (military area, quarry, private land)
Technical object:
quarry
ID:
3765
Geology
Short characteristics of the site:
Great active quarry in intrusive ryolite body. Rock is crystalline, with phenocrysts of quartz and feldspar. Abundant xenolits of underlying rocks (Cambrian sedioments, andesite). Various dykes of lamprophyric rocks cut the massive in two oblique directions. Ryolite belongs to the Upper Cambrian (Furong) Křivoklát-Rokycany comples, dykes are younger (Ordovician?).
Regional geologic unit:
Bohemian Massif > Bohemicum > Barrandien
Stratigraphy:
Upper Cambrian
Subject:
volcanology
Geological phenomenon:
intrusion, dyke
Genesis:
volcanic
Rock:
rhyolite, lamprophyre
Territorial protection
Level of protection:
Registred geological localities suggested to protection in Protected landscape area
Part of LEPA (Large-size especially protected areas):
Křivoklátsko
Part of national geopark:
Barrandien
Conflicts of interests:
exploitation
References
- Vorel T. et.al. (2014): Vysvětlivky ke geologické mapě 12-323 list Podmokly. - MS Archív ČGS Praha.
Elaboration and Updating
Elaborated by:
Petr Hradecký, 02.04.2014
Updated by:
Citation
The database Important geological localities of the Czech Republic: 3765 [online]. Prague: Czech Geological Survey, 1998 [cit. 2023-06-16]. Available from: https:// lokality.geology.cz/3765.
Location in map:
Assessment
Scientifical assesment:
great
Educational assesment:
middle
Significance:
regional
Representativeness:
major
Geological importance:
significant study profile
Excursion locality:
yes
Locality conditions:
no problems
You can send information about a change in the status of the site to lokality@geology.cz
