General Characteristics

County (administration): Moravia-Silesian Region
District (town): Nový Jičín
Cadastre: Straník
Map 1 : 50 000 (sheet No): 2512, 25124
Geological region: Subsilesian & Silesian units
Accessibility: - no traffic restriction ( by car)
Technical object: guarry
Excursion locality: yes
ID : 4303

Geology

Short characteristics of the site: An abandoned small quarry on the western side of the Straník – Kojetín road exposes a sill of olivine basalt of the teschenite association of rocks, surrounded by Lower Cretaceous claystones of the Hradiště Formation (Silesian Unit of the Carpathian Flysch Belt). Medium-grained basalt with an ophitic structure contains lath-shaped plagioclase, needle-like amphiboles and the ground mass composed of carbonates, chlorites and minerals of the serpentine group. The contact between the basalt and claystones consists of gray platy tuffite or contact-hornfels. The dark gray claystones of the Hradiště Formation contain abundant foraminifers of the upper Hauterivian: Falsogaudryinella tealbyensis (Bart.), Protomarssonella hechti (D. et M.), Recurvoidella vocontiana (Moull.), Gavelinella sp. Finds of ammonites ?Partschiceras infundibulum (Orb.) and ?Hemibaculites sp. indicate the lower Barremian age.
Regional geologic unit: Carpathian - Flysch belt - Outer (Menilit-Krosněny) group of nappes
Stratigraphy: mezozoikum - křída - spodní křída
Subject: geology, volcanology, paleontology, petrology, stratigraphy
Geological phenomenon: characteristic rock, lava, fossils fauna, deformation fabrics, intrusion, lake
Genesis: volcanic , sedimentary
Rock: basalt, claystone

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: B - Geological phenomenon is the reason for a recommendation to the protection
Part of the Geopark: Podbeskydí
Conflicts of interests: vegetation

References

Vašíček, Z. (1972): Ammonoidea of the Těšín-Hradiště Formation (lower Cretaceous) in the Moravskoslezské Beskydy Mts. – Rozpr. Ústř. Úst. geol., 38, 103 str. Buriánek, D., Bubík, M. (2012): Horniny těšínitové asociace v okolí Valašského Meziříčí, Acta Mus. Moraviae, Sci. geol., 97, 1, 105–127; Bubík et al. (2022): Vysvětlivky k základní geologické mapě České republiky 1 : 25 000, list 25-124 Starý Jičín, Archiv České geologické služby, Praha.

Elaboration and Updating

Elaborated by: Maceček Lukáš, 12.04.22
Updated by: Bubík Miroslav 12.10.22

Citation

The database Significant geological localities of the Czech Republic: 4303 [online]. Prague: Czech Geological Survey, 1998 [cit. 2024-05-04]. Available from: http:// lokality.geology.cz/4303.

Location in map: