Porubský bludný balvan
General Characteristics
County (administration):
Moravskoslezský kraj
District (town):
Ostrava-město
Village:
Ostrava
Cadastre:
Poruba
Map sheets:
15-43 Ostrava, 15-431 V.Polom
Accessibility:
no traffic restriction ( by car)
ID:
2362
Geology
Short characteristics of the site:
Quaternary, areas of continental glaciation. The second largest, but longest erratic boulder in the Czech Republic. It was found within fluvioglacial sands in a brook bed in the Poruba City, now it is placed on a pedestal nearby. It consists of a coarse grained porphyric granite (granitoid) with potessium feldspar phenocrysts as large as 1 - 2 cm, common rock forming minerals and numerous blackish aggregates of dark minerals. This erratic boulder comes from the Baltic Shield.
Regional geologic unit:
Bohemian Massif > Quaternary > Quaternary of deposition areas of Bohemian Massif
Stratigraphy:
Quaternary
Subject:
geomorphology, petrology, quaternary geology
Geological phenomenon:
erratics
Genesis:
glacigenic (glacier activity)
Rock:
granite
Territorial protection
Level of protection:
Nature monument
Additional information:
See the Digital register of the Agency for Nature Conservation and Landscape Protection of the Czech Republic AOPK ČR, code 1205 (Porubský bludný balvan)
Conflicts of interests:
without conflicts
References
- Weissmannová H. a kol (2004): Ostravsko. In: Mackovčin P. a Sedláček M.(eds.): Chráněná území ČR, svazek X. Agentura ochrany přírody a krajiny ČR a EkoCentrum Brno, str.290 Praha.
- Výpověď pamětníka vyzdvižení na http://www.vesmir.cz/clanek/porubske-eratiku
Elaboration and Updating
Elaborated by:
Pavlína Jirková, 01.03.2010
Updated by:
Malík Jan, 18.08.2011, Malík Jan, 18.08.2011, Kukal Zdeněk, 29.12.2012
Citation
The database Important geological localities of the Czech Republic: 2362 [online]. Prague: Czech Geological Survey, 1998 [cit. 2023-06-16]. Available from: https:// lokality.geology.cz/2362.
Location in map:
Assessment
Scientifical assesment:
medium
Educational assesment:
major
Significance:
supraregional
Representativeness:
major
Geological importance:
geoturistic value
Locality conditions:
no problems
You can send information about a change in the status of the site to lokality@geology.cz
