General Characteristics

County (administration): Central Bohemia Region
District (town): Kladno
Cadastre: Unhošť
Map 1 : 50 000 (sheet No): 1223, 12233
Geological region: Barrandian Proterozoic; Tisá and Čistá-Jesenice massifs
Accessibility: - no traffic restriction ( by car)
ID : 3789

Geology

Short characteristics of the site: This locality is called "Dědkův mlýn - the Old Man´s Mill". 250 m long section follows a road cut. Alternation of schists, phylites, greywackes, metagreywackes, siltstones and metasiltstones is exposed. This represents a typical sequence of Neoproterozoic Barrandian deposits. The clayey sediments are variably metamorphosed, in places up to phylites. Recrystallisation of clay matrix is intensive in places. Chlorite and sericite accompany such recrystallisation. The rock sequence belongs to the Kralupy-Zbraslav Group of the Barrandian Neoproterozoic. At a margin of this outcrop the sedimentary sequence is cut by thin vein of lamprophyre.
Regional geologic unit: Bohemian Massif - crystalline complex and pre-Variscian Palaeozoic - Bohemicum (Central Bohemian region) - Barrandien
Stratigraphy: proterozoikum - neoproterozoikum (1000 - 542 Ma)
Subject: lithology, petrology, sedimentology
Geological phenomenon: outcrop, dyke
Genesis: sedimentary, magmatic
Rock: greywacke, lamprophyre

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: without conflicts

References

M.Stárková et al. (2014): Vysvětlivky ke geologické mapě 12-233 list Unhošť. - MS Archív ČGS Praha.

Elaboration and Updating

Elaborated by: Vorel Tomáš, 11.09.14

Citation

The database Significant geological localities of the Czech Republic: 3789 [online]. Prague: Czech Geological Survey, 1998 [cit. 2024-04-29]. Available from: http:// lokality.geology.cz/3789.

Location in map: