General Characteristics

County (administration): Hradec Králové Region
District (town): Trutnov
Cadastre: Prkenný Důl
Map 1 : 50 000 (sheet No): 0342, 03424
Geological region: Permo-Carboniferous of the Krkonoše-piedmont and Lower Silesian basins
Accessibility: - access without footpath
Technical object: gallery
Excursion locality: yes
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 - superficial deposits and post-Variscian magmatites - Upper Carboniferous and Permian - Lugic Late Palaeozoicum (including Triassic deposits)
Stratigraphy: paleozoikum - karbon - svrchní karbon - siles
Subject: volcanology
Geological phenomenon: volcaniclastic deposits
Genesis: volcanic
Rock: ignimbrite

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: 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: Tasáryová Zuzana, 11.01.12
Updated by: Kukal Zdeněk 26.11.12

Citation

The database Significant geological localities of the Czech Republic: 3377 [online]. Prague: Czech Geological Survey, 1998 [cit. 2024-04-18]. Available from: http:// lokality.geology.cz/3377.

Location in map: