Žíla polzenitu na vrchu Pelousek u Modlibohova
General Characteristics
County (administration):
Liberecký kraj
District (town):
Liberec
Village:
Český Dub
Cadastre:
Smržov u Českého Dubu, Starý Dub
Map sheets:
03-31 Mimoň, 03-312 Všelibice
Accessibility:
no traffic restriction ( by car)
Technical object:
old mine workings
ID:
3400
Geology
Short characteristics of the site:
The dyke of polzenite (modlibovite) forming part of the "Čertova zeď - the Devil´s Wall". The dyke is interrupted by six metres thick tectonic fracture filled by the Cretaceous sediments and hydrothermal calcite and aragonite. The sandstones belong to the Middle Turonian and correspond to the Jizera Formation, partly also the Bílá Hora Formation. Also a sort of diatrems can be observed, features filled with a pyroclastic sediments. The K-Ar dating of the dyke offers wide scale of data - from the Upper Cretaceus to Neogene. The rock modlitbovit contains a great variety of accessories, from apatite up to ore minerals. Traces of former iron exploitation can be observed in this locality.
Regional geologic unit:
Bohemian Massif > Tertiary > Tertiary - scaterred relics of alkaline Volcanics
Stratigraphy:
Tertiary, Upper Cretaceous
Subject:
volcanology
Geological phenomenon:
dyke, characteristic rock
Genesis:
volcanic , sedimentary
Rock:
polzenite, sandstone
Territorial protection
Level of protection:
Registered geological localities suggested for protection
Conflicts of interests:
waste disposal, exploitation
References
- PALUSKA, Antonín & VESELÝ, Pavel (2010): Návrh na rozšíření chráněné oblasti Národní přírodní památky „Čertova zeď“ v severních Čechách (Český Dub-Osečná) a vytvoření chráněné oblasti „Velká Čertova zeď“.- 2. vulkanologický seminář odborné skupiny vulkanologie České geologické společnosti v Teplicích,Speciální publikace Regionálního muzea v Teplicích, str. 35-36.
Elaboration and Updating
Elaborated by:
Pavla Gürtlerová, 07.02.2012
Updated by:
Gürtlerová Pavla, 21.03.2014, Gürtlerová Pavla, 24.02.2015, Kukal Zdeněk, 25.09.2017, Kukal Zdeněk, 26.09.2017, Kukal Zdeněk, 20.12.2017, Vajskebrová Markéta, 04.10.2021
Citation
The database Important geological localities of the Czech Republic: 3400 [online]. Prague: Czech Geological Survey, 1998 [cit. 2023-06-16]. Available from: https:// lokality.geology.cz/3400.
Location in map:
Assessment
Scientifical assesment:
extraordinary
Educational assesment:
major
Significance:
international
Representativeness:
middle
Geological importance:
significant study profile, geo-historical value, geoturistic value
Excursion locality:
yes
Locality conditions:
acceptable
You can send information about a change in the status of the site to lokality@geology.cz