Zpravodaj Hnědé uhlí 2011, 51(1)
Basalt organs near Rotava in the region of Sokolov
- Sokolovská uhelná, právní nástupce, a.s., Sokolov
The paper describes the geological setting, composition and origin of the stone organs of the Varhany and Skalka hills near Rotava, north of Sokolov. The volcanic bodies are situated along the fault system that separates the Sokolov Basin and the uplifted area Krušné Hory Mountains. The architecture and composition of both volcanic bodies was studied by means of geological mapping and petrological, geochemical, and structural geological methods. The hills are likely Miocenic cumulo-domes of basanitic composition. Varhany is a single dome elevated during one volcanic effusion of nepheline basanite above prolonged vents and subsequently rapidly solidified to limburgite. Skalka originated in several volcanic phases, subsequently fractured and filled with dykes of nepheline basanite.
Keywords: columnar jointing, stone organ, Varhany and Skalka near Rotava, Miocenic basalts, western Krušné Hory Mountains
Published: March 1, 2011 Show citation