Lom Družec
General Characteristics
County (administration):
Středočeský kraj
District (town):
Kladno
Village:
Žilina, Družec
Cadastre:
Družec, Žilina
Map sheets:
12-23 Kladno, 12-233 Unhošť
Accessibility:
no traffic restriction ( by car)
Technical object:
guarry
ID:
3780
Geology
Short characteristics of the site:
Still active quarry with two levels in which massive fine grained basalt is exploited. It belongs to the Blovice Formation of Kralupy-Zbraslav Group of the Barrandian Neoproterozoic. Described basalt is often called "spilite". Its lower parts are massive and fresh, uppermost parts already weathered. In some parts typical pillow lava structures occur, sometimes patches which resemble devitrificationm process. Spilites display microoffitic texture and contain albitized feldspars with Mg-Pumpellyite.
In marginal parts of the quarry a contact with Neoproterozoic sediments, schists and metagreywackes, can be observed.
Regional geologic unit:
Bohemian Massif > Bohemicum > Barrandien > Barrandien - Paleozoic > Kralupy - Zbraslav Group
Stratigraphy:
Neoproterozoic
Subject:
geology, volcanology, structural geology
Geological phenomenon:
characteristic rock, lava
Genesis:
volcanic , sedimentary
Rock:
spilite, black shale
Territorial protection
Level of protection:
Registered geological localities suggested for protection
Conflicts of interests:
open cast mining
References
- M.Stárková et al. (2014): Vysvětlivky ke geologické mapě 12-233 list Unhošť. - MS Archív ČGS Praha
Elaboration and Updating
Elaborated by:
Marcela Stárková, 22.08.2014
Updated by:
Citation
The database Important geological localities of the Czech Republic: 3780 [online]. Prague: Czech Geological Survey, 1998 [cit. 2023-06-16]. Available from: https:// lokality.geology.cz/3780.
Location in map:
Assessment
Scientifical assesment:
great
Educational assesment:
major
Significance:
supraregional
Representativeness:
major
Geological importance:
significant study profile, geo-historical value, 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
