General Characteristics

County (administration): Plzeň Region
District (town): Klatovy
Cadastre: Jiřičná
Map 1 : 50 000 (sheet No): 2231, 22313
Geological region: Šumava Moldanubicum - district KT; Moldanubicum of the Český les Mts.; Domažlice crystalline complex; W-Bohemian Pluton; W-Bohemian basic magmatites
Accessibility: - entry permit for car necessary
ID : 3859

Geology

Short characteristics of the site: Group of five rocky cliffs as much as 20 m high on a steep slope, overlooking the road connecting Petrovice with Hartmanice settlements. These rocks belong to the Monotonous Group of Moldanubian Šumava Mts. The cropping out rock is classified as porphyric medium-grained amphibole-biotite granodiorite. Contact with surrounding migmatites and migmatitized paragneisses was tectonically affected. The granodiorite consists of amphibole, biotite, potessium feldspar and plagioklase. The phenocrysts of potassium feldspar can be as much as 5 cm large.
Regional geologic unit: Bohemian Massif - crystalline complex and pre-Variscian Palaeozoic - Moldanubicum - Metamorphic units in Moldanubicum
Stratigraphy: paleozoikum až proterozoikum
Subject: petrology
Geological phenomenon: characteristic rock
Genesis: magmatic
Rock: granodiorite

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
Conflicts of interests: ground instability

References

Žáčková E. a kolektiv autorů (2015): Vysvětlivky k základní geologické mapě ČR v měřítku 1 : 25 000 list 22313 Velhartice.- Česká geologická služba Praha.

Elaboration and Updating

Elaborated by: Žáčková Eliška, 09.06.15
Updated by: Kukal Zdeněk 12.09.17

Citation

The database Significant geological localities of the Czech Republic: 3859 [online]. Prague: Czech Geological Survey, 1998 [cit. 2024-05-03]. Available from: http:// lokality.geology.cz/3859.

Location in map: