General Characteristics

County (administration): South Bohemia Region
District (town): Český Krumlov
Cadastre: Polná u Českého Krumlova
Map 1 : 50 000 (sheet No): 3223, 32231
Geological region: Šumava Moldanubicum - districts ST, PT, CK, CB, PI
Accessibility: - special entry permit necessary (military area, quarry, private land)
ID : 3727

Geology

Short characteristics of the site: The locality is situated just on the traceable fault. Surrounding hornblendites with granulite fragments show tectonic crushing and hydrothermal alteration. Typical tectonic brecciation is abundant. Amphibolite blocks appear with amphibole phenocrysts as much as 2 cm large. This locality is situated in the Protected Landscape Area Šumava.
Regional geologic unit: Bohemian Massif - crystalline complex and pre-Variscian Palaeozoic - Moldanubicum - Metamorphic units in Moldanubicum
Stratigraphy: paleozoikum
Subject: geology, structural geology, petrology
Geological phenomenon: outcrop, characteristic rock
Genesis: tectonic, hydrothermal mineralization
Rock: hornblendite

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) - Šumava
Conflicts of interests: warfare

References

Pertoldová J., Nahodilová R. eds (2013): Vysvětlivky k základní geologické mapě 1:25 000 list 32-231 Horní Planá. - MS, ČGS Praha

Elaboration and Updating

Elaborated by: Doláková Eva, 09.10.13
Updated by: Pertoldová Jaroslava 16.10.13

Citation

The database Significant geological localities of the Czech Republic: 3727 [online]. Prague: Czech Geological Survey, 1998 [cit. 2024-05-07]. Available from: http:// lokality.geology.cz/3727.

Location in map: