Libeč - melafyry
General Characteristics
County (administration):
Královéhradecký kraj
District (town):
Trutnov
Village:
Trutnov, Zlatá Olešnice
Cadastre:
Zlatá Olešnice, Debrné
Map sheets:
03-42 Trutnov, 03-424 Trutnov
Accessibility:
no traffic restriction ( by car)
Technical object:
guarry
ID:
3378
Geology
Short characteristics of the site:
Bohemian part of the Intrasudetic Basin, Upper Carboniferous. Basaltandesite (melaphyre) part of the Petrovice Beds of the Žacléř Formation. Two lava flows can be recognized, lower one with distinct columnar jointing. Upper flow is in contact with overlying sandstones of the Petrovice Beds. Basaltandesite is fine-grained, of microporphyric up to porphyric texture, and with intersertal groundmass. Some phenocrysts, as calcite-limonite pseudomorphs after olivine, are abundant.
Regional geologic unit:
Bohemian Massif > Upper Carboniferous and Permian > Lugic Late Palaeozoicum (including Triassic deposits) > Intra-Sudetic Basin
Stratigraphy:
Upper Carboniferous
Subject:
petrology
Geological phenomenon:
lava flow
Genesis:
volcanic
Rock:
melaphyre, basalt
Territorial protection
Level of protection:
Registered interesting geological localities
Part of national geopark:
Broumovsko
Conflicts of interests:
without conflicts
References
- Holub, V. (1961): Karbonský vulkanismus v české části vnitrosudetské deprese.–Acta Mus. Reginaehradec., S.A., Sci. natru., 3, 1–2. Hradec Králové
Elaboration and Updating
Elaborated by:
Zuzana Tasáryová, 11.01.2012
Updated by:
Kukal Zdeněk, 26.11.2012
Citation
The database Important geological localities of the Czech Republic: 3378 [online]. Prague: Czech Geological Survey, 1998 [cit. 2023-06-16]. Available from: https:// lokality.geology.cz/3378.
Location in map:
Assessment
Scientifical assesment:
great
Educational assesment:
middle
Significance:
regional
Representativeness:
major
Geological importance:
geo-regional value (mapping)
Excursion locality:
yes
Locality conditions:
no problems
You can send information about a change in the status of the site to lokality@geology.cz
