General Characteristics

County (administration): Moravia-Silesian Region
District (town): Bruntál
Cadastre: Mezina
Map 1 : 50 000 (sheet No): 1531, 15313
Geological region: Moravosilesian Devonian; Drahany, Mírov and Jeseníky Culm, incl. the Maleník block
Accessibility: - no traffic restriction ( by car)
Technical object: guarry
Excursion locality: yes
ID : 2329

Geology

Short characteristics of the site: Bhemian Massif, Quaternary volcanics. Abandoned quarry exposing a lava flow from the Venušina sopka (the Venus Volcano Center). Exposed rocks represent eroded relic of a volcanic cone, consisting mainly of volcaniclastic rocks with interlayers of lava. Three individual lava flows were identified separated by thick layers of volcaniclastic deposits. Basic volcanics are classified as nephelinic basalt up to olivine nephelinite and limburgite. This rock is porous with some augite and olivine phenocrysts. Some parts of basalt bodies show columnar jointing as well as sphaeroidal disintegration. Radiometric dating indicates basalt flow age 1.8 Ma.
Regional geologic unit: Bohemian Massif - superficial deposits and post-Variscian magmatites - Quaternary - Quaternary volcanism of Bohemian Massif
Stratigraphy: kenozoikum - kvartér
Subject: volcanology, petrology
Geological phenomenon: lava flow
Genesis: volcanic
Rock: basanite

Territorial conservation

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
Protection of a geol. phenomenon: A - Protected Area (declared as Geological Locality)
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.99 Praha.

Elaboration and Updating

Elaborated by: Jirková Pavlína, 26.03.09
Updated by: Otava Jiří 04.11.11, Rapprich Vladislav 31.08.12

Citation

The database Significant geological localities of the Czech Republic: 2329 [online]. Prague: Czech Geological Survey, 1998 [cit. 2024-04-23]. Available from: http:// lokality.geology.cz/2329.

Location in map: