Malý Křenov - ryolitový ignimbrit
General Characteristics
County (administration):
Královéhradecký kraj
District (town):
Trutnov
Village:
Trutnov
Cadastre:
Babí
Map sheets:
03-42 Trutnov, 03-424 Trutnov
Accessibility:
access without footpath
Technical object:
gallery
ID:
3377
Geology
Short characteristics of the site:
Intrasudetic Basin, Upper Carboniferous. Rhyolite ignimbrite, part of Petrovice Beds of the Žacléř Formation. Ignimbrite can be characterized as coarse grained, reddish-brownish, up to greenish pyroclastic rock. Its groundmass is vitroclastic, slightly recrystallized, with phenocrysts of plagioclase, K-feldspar, quartz and vermicular phyllosilicate (kaolinite?).
Regional geologic unit:
Bohemian Massif > Upper Carboniferous and Permian > Lugic Late Palaeozoicum (including Triassic deposits) > Intra-Sudetic Basin
Stratigraphy:
Upper Carboniferous
Subject:
volcanology
Geological phenomenon:
volcaniclastic deposits
Genesis:
volcanic
Rock:
ignimbrite
Territorial protection
Level of protection:
Registered interesting geological localities
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.
- Plamínek, J. – Tásler, R. – Pšmourný, K. – Vrtišková–Stárková, M. – Středa, J. – Moupic, Z. – Kratochvíl, J. – Šalanský, K. – Manová, M. (1990): Vysvětlivky k základní geologické mapě ČSFR 1:25 000 list 03–422 Žacléř.– Archiv. zpráva ČGÚ. Praha.
- Hrdličková, D. (1969): Kyselé vulkanity JZ křídla vnitrosudetské pánve.–Archiv. zpráva ÚÚG. Praha
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: 3377 [online]. Prague: Czech Geological Survey, 1998 [cit. 2023-06-16]. Available from: https:// lokality.geology.cz/3377.
Location in map:
Assessment
Scientifical assesment:
medium
Educational assesment:
middle
Significance:
supraregional
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
