General Characteristics

County (administration): Plzeň Region
District (town): Plzeň-sever
Cadastre: Horní Bříza, Trnová
Map 1 : 50 000 (sheet No): 1233, 12331
Geological region: Permo-Carboniferous and Tertiary of the Central Bohemian & Western Bohemian limnic regions
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 - superficial deposits and post-Variscian magmatites - Upper Carboniferous and Permian - Central and Western Bohemian Late Palaeozoicum
Stratigraphy: paleozoikum - karbon
Subject: geology, sedimentology, paleontology, economic geology
Geological phenomenon: characteristic rock
Genesis: sedimentary, weathering
Rock: kaolin

Territorial conservation

Level of protection: Registered interesting geological localities
Protection of a geol. phenomenon: C - Geological phenomenon is the reason for a registration in the database of CGS
Part of the 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: Mašek Jan, 11.02.94
Updated by: Vajskebrová Markéta 08.09.21

Citation

The database Significant geological localities of the Czech Republic: 992 [online]. Prague: Czech Geological Survey, 1998 [cit. 2024-04-19]. Available from: http:// lokality.geology.cz/992.

Location in map: