Horní Bříza
General Characteristics
County (administration):
Plzeňský kraj
District (town):
Plzeň-sever
Village:
Trnová, Horní Bříza
Cadastre:
Horní Bříza, Trnová u Plzně
Map sheets:
12-31 Plasy,12-33 Plzeň, 12-331 Třemošná,12-313 Kaznějov
Technical object:
guarry
ID:
992
Geology
Short characteristics of the site:
Giant kaoline open pit. Kaolinitic sands are exploited. They are of variable grain-size, also with gravel interbeds. Sands exhibit common oblique bedding. All the sediments are part of the Plzeň basin and correspond the Týnec Formation (Carboniferous, Stephanian).
Regional geologic unit:
Bohemian Massif > Upper Carboniferous and Permian > Central and Western Bohemian Late Palaeozoicum
Stratigraphy:
Carboniferous
Subject:
geology, sedimentology, paleontology, economic geology
Geological phenomenon:
characteristic rock
Genesis:
sedimentary, weathering
Rock:
kaolin
Territorial protection
Level of protection:
Registered interesting geological localities
Part of national geopark:
Barrandien
Conflicts of interests:
open cast mining
References
- Mašek, J. et al. (1994): Vysvětlivky k základní geologické mapě ČR 1 : 25 000, 12-331 Třemošná, Český geologický ústav, Praha
- Jiránek, J. (1977): Geology, petrology and genesis of the kaolin sediments of the Horní Bříza and Kaznějov deposits in the Plzeň Basin. - Folia Mus. Rer. natur. Bohem. occid., Geologica, 8, 1-34. Plzeň
- J. et al. (1984): Závěrečná zpráva úkolu Horní Bříza. - MS Geofond, Praha
- Poruba, Z. - Špinar, Z. (1956): Průzkum kaolinu, Horní Bříza 1955. - MS Geofond Praha
- Poruba, Z. - Špinar, Z. - Malich, O. (1958): Horní Bříza - Kaolin 1956-1958. - MS Geofond Praha
- Wild, J. (1977): Historie dobývání a úpravy ložisek kaolinů v S. části plzeňské pánve. - Sbor. Západoč. Muz., Přír., 21, 1-91. Plzeň
Elaboration and Updating
Elaborated by:
Jan Mašek, 11.02.1994
Updated by:
Vajskebrová Markéta, 08.09.2021
Citation
The database Important geological localities of the Czech Republic: 992 [online]. Prague: Czech Geological Survey, 1998 [cit. 2023-06-16]. Available from: https:// lokality.geology.cz/992.
Location in map:
Assessment
Scientifical assesment:
Educational assesment:
Significance:
Representativeness:
Geological importance:
Locality conditions:
You can send information about a change in the status of the site to lokality@geology.cz
