Skalní defilé u Jiřičné
General Characteristics
County (administration):
Plzeňský kraj
District (town):
Klatovy
Village:
Petrovice u Sušice
Cadastre:
Kojšice
Map sheets:
22-31 Sušice, 22-313 Velhartice
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 > Moldanubicum > Metamorphic units in Moldanubicum > Moldanubicum of Šumava and South Bohemia
Stratigraphy:
Proterozoic - Paleozoic
Subject:
petrology
Geological phenomenon:
characteristic rock
Genesis:
magmatic
Rock:
granodiorite
Territorial protection
Level of protection:
Registered interesting geological localities
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:
Eliška Žáčková, 09.06.2015
Updated by:
Kukal Zdeněk, 12.09.2017
Citation
The database Important geological localities of the Czech Republic: 3859 [online]. Prague: Czech Geological Survey, 1998 [cit. 2023-06-16]. Available from: https:// lokality.geology.cz/3859.
Location in map:
Assessment
Scientifical assesment:
medium
Educational assesment:
middle
Significance:
regional
Representativeness:
middle
Geological importance:
geo-regional value (mapping)
Locality conditions:
acceptable
You can send information about a change in the status of the site to lokality@geology.cz
