Žulové výchozy Medvědí kameny
General Characteristics
County (administration):
Karlovarský kraj
District (town):
Cheb
Village:
Lázně Kynžvart
Cadastre:
Lázně Kynžvart
Map sheets:
11-32 Lázně Kynžvart, 11-322 Lázně Kynžvart
Accessibility:
passable footpath
ID:
4460
Geology
Short characteristics of the site:
A rock formation formed by loosely clustered boulders of porphyry granite of the Ore Mountains pluton, of various sizes (in the order of meters). The boulders, originally sharp-edged, formed by cracking of granite along a network of cracks, are rounded due to chemical weathering in a warm and humid climate at the end of the Paleogene. In some places, pseudo-scrapes (grooves, grooves or notches on the surface of the rock, formed by the action of rainwater and weathering) can be observed. Unlike the scratches that occur in limestone or dolomite, pseudo-scrapes occur in non-calcareous rocks, e.g. in granite or amphibolites. There is also a rock bowl on one of the boulders. Rock bowls are oval or bowl-shaped depressions on horizontal or slightly inclined rock surfaces that are formed by natural processes of weathering and erosion. Nearby (about 200 m southeast) is the Kynžvartský kámen natural monument (ID 2356).
Regional geologic unit:
Bohemian Massif > Saxothuringicum > Krušné hory Mts. (Erzgebirge) Pluton
Stratigraphy:
Devonian - Permian
Subject:
geomorphology, geology
Geological phenomenon:
rock, karren
Genesis:
weathering
Rock:
granite
Territorial protection
Level of protection:
Registred geological localities suggested to protection in Protected landscape area
Part of LEPA (Large-size especially protected areas):
Slavkovský les
Part of national geopark:
Egeria
Conflicts of interests:
others human activity, agriculture
References
- Kůrková I., Žáček V., Landa D.-A., Rozkošný I., Vylita T (2026): Slavkovský les, zrození vody z kamene. Česká geologická služba, Praha.
- Tvrdý J., Peterek A., Bartoš J., Holzförster F., Lehrberger G., Schunk R., Urban M. (2023): GEOtrasa ŽULA/Geo-Tour GRANIT. Muzeum Sokolv/Geopark Egeria ve spolupráci/in Zusammenarbeit mit GEOPARK Bayern-Böhmen, s. 92-95, 151 s., Sokolov.
Elaboration and Updating
Elaborated by:
Ivan Rozkošný, 23.12.2025
Updated by:
Citation
The database Important geological localities of the Czech Republic: 4460 [online]. Prague: Czech Geological Survey, 1998 [cit. 2023-06-16]. Available from: https:// lokality.geology.cz/4460.
Location in map:
Assessment
Scientifical assesment:
medium
Educational assesment:
middle
Significance:
supraregional
Representativeness:
middle
Geological importance:
geoturistic value
Locality conditions:
no problems
You can send information about a change in the status of the site to lokality@geology.cz
