Goethova skalka (Goethe’s Cliff) Nature Monument
Quartzite granite outcrop on the Bohemian Quartz Lode passing through the Aš district, i.e. the so-called Hazlov Quartz Mound. A site of major cultural and historical significance. Cross-road with path leading to the memorial plaque of J. W. Goethe. Mountain-climbing paths. The site covers an area of 1.33 hectares.
The locality is a unit of the Smrčiny Granite Massif. The granite massif is composed of three types of granite on the Czech side of the border, differing in the mica content and its structure. The oldest type is porphyric biotite granite constituting the south-western part of the massif, which may be easily found on the territory between Halo and Libá. Medium-textured two-mica (biotite-muscovite) granite forms the central and northern part of the Smrčiny Granite Massif. White mica is more frequent towards the eastern edge where the rock massif gradually transforms into muscovite. Muscovite, located to the west of the villages of Skalná and Plesná was subject to intense kaolinization in the late Cretaceous period. Tertiary volcanism products locally penetrate through the Smrčiny Granite Massif – a massive basalt nappe may be found near the village of Libá, which is exploited as a building stone deposit.
Fault lines of regional significance are the Mariánské Lázně Fault Line and the Aš Cleft (continuation of the Bohemian Quartz Lode). The Aš zone of fracture manifests itself on the territory of the Cheb Basin along the south-western tertiary constraint. It is linked with basalt effusions located to the south of Cheb, including the Komorní hůrka effusion. The continuation of the Czech Quartz Lode, i.e. the Hazlov Quartz Lode, creates a locality known as Goethova skalka (Goethe's Rockery). The site known as U Cihelny is formed by erlans in the exocontact zone of the Smrčiny granite. Both locations are typical Goethe sites – the former with respect to geomorphology, the latter with a view to its mineralogical character (occurrence of brown vesuvianite known as egeran).