Česká geologická služba
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Homberk

General Characteristics

County (administration): Plzeň Region
District (town): Rokycany
Cadastre: Příkosice
Map 1 : 50 000 (sheet No): 2212, 22121
Geological region: Barrandian Proterozoic; Tisá and Čistá-Jesenice massifs
Technical object: guarry
Excursion locality: yes
ID : 4157

Geology

Short characteristics of the site: Outcrop of Neoproterozoic pillow lavas, pillows are well rounded (0,3x1,5m); these rocks are considered to be part of Neoproterozoic-Lower Paleozoic accretionary wedge (Hajná et al.2013, 2018)
Regional geologic unit: Bohemian Massif - crystalline complex and pre-Variscian Palaeozoic - Bohemicum (Central Bohemian region) - Barrandien
Stratigraphy: proterozoikum - neoproterozoikum (1000 - 542 Ma)
Subject: volcanology
Geological phenomenon: spherical structure, lava
Genesis: volcanic
Rock: spilite

Territorial conservation

Level of protection: Registered interesting geological localities
Protection of a geol. phenomenon: C - Geological phenomenon is the reason for a registration in the database of CGS
Part of the Geopark: Barrandien
Conflicts of interests: vegetation

References

Stárková et. al. (2019): Vysvětlivky k Základní geologické mapě 1: 25 000 list 22-121 Mirošov. - MS ČGS Geofond Praha.; HAJNÁ, J. – ŽÁK, J. – DÖRR, W. – KACHLÍK, V – SLÁMA, J. (2018): New constraints from detrital zircon ages on prolonged, multiphase transition from the Cadomian accretionary orogen to a passive margin of Gondwana. – Precambrian Research,Volume 317, 159–178.

Elaboration and Updating

Elaborated by: Stárková Marcela, 07.08.19

Citation

The database Significant geological localities of the Czech Republic: 4157 [online]. Prague: Czech Geological Survey, 1998 [cit. 2024-05-05]. Available from: http:// lokality.geology.cz/4157.

Location in map:

Links to neighbouring localities within 2 km radius are available on mouse click in the map window.
struktura polštářových láv spilitu, Marcela Stárková, 2018


(C) 2003-2012 ČGS, verse aplikace 1.21 [3.2.2016]