Wartberg (Selb)
| Wartberg | ||
|---|---|---|
 Southern Wartberg quarry |
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| height | 688 m | |
| location | Same | |
| Mountains | Fichtel Mountains | |
| Coordinates | 50 ° 10 '37 " N , 12 ° 12' 2" E | |
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The Wartberg is a 688 m high mountain 500 m east of Längenau , a district of the city of Selb in the district of Wunsiedel in the Fichtel Mountains ( Bavaria ), right on the border with the Czech Republic .
geology
The porphyry granite on the Wartberg is penetrated by several basalt veins , some of which are columnar. The walls of two former quarries form profile-like outcrops where the sharp contact between the dark basalt and the light granite can be observed. The situation is characterized by conveyor tunnels deep under a former volcano that has been completely eroded by erosion.
Around 20 million years ago, thin tectonic fissures and crevices formed in the granitic earth's crust in connection with alpine orogenesis . Low-viscosity basaltic magma penetrated from a depth of up to 80 km below the surface and expanded it into the dm and m range. The formerly thick rock cover of the rocks that are now on the surface of the Wartberg and the associated high ambient pressure prevented explosive processes at that time. Such may only have occurred in the course of the further penetration of the molten rock into higher areas with less rock cover that were completely removed in the past million years. If there was once explosive volcanism above today's Wartberg, such as at Železná hůrka , Hirschentanz , Waldecker Schloßberg or Parkstein (basalt cone) , all evidence of this has now been erased by erosion .
Today's Wartberg is not a former volcanic chimney or a Härtling or even a cone mountain consisting of remnants of volcanic activity and freed from the original surrounding rocks. At most, it is an erosively exposed, unexplosive lower floor below a volcanic vent that has completely disappeared.
Because of the interesting basalt apophyses in the Selber granite, the area is one of the most interesting basalt deposits in the Fichtelgebirge. The northern and southern Wartberg quarries have been abandoned and filled with groundwater.
Southern Wartberg quarry
The natural monument and geotope "Southern Wartberg Quarry" (geotope number: 479A007) has been designated as geoscientific "valuable" by the Bavarian State Office for the Environment .
Northern Wartberg quarry
The Bavarian State Office for the Environment lists the “Northern Wartberg Quarry” (geotope number: 479A008) as geoscientific “significant”.
Buildings
A simple flat ski lift with floodlights used to be operated on the western slope . On the top of the mountain, with the support of the district of Wunsiedel in the Fichtelgebirge, a disused Bundeswehr site was converted into a youth camp site by the district youth ring.
literature
- Peterek, Andreas / Rohrmüller, Johann: On the geological history of the Fichtelgebirge and its frame; in: Der Aufschluss 4 + 5/2010, p. 231
- Müller, Friedrich : Bavaria's rich corner (1984), pp. 170, 205, 219, 237
- Neidhardt, Julius: hiking guide through the Fichtelgebirge; VI. Edition, p. 264
- Bayer. Oberbergamt: The usable minerals, rocks and earths of Bavaria (1924), p. 2
- Herrmann, Dietmar: The Wartberg near Selb; in: Der Siebenstern 2011, p. 292
Individual evidence
- ↑ Bavarian State Office for the Environment, Geotop Südlicher Wartberg quarry near Längenau (accessed on October 15, 2017).
- ↑ Bavarian State Office for the Environment, Geotope Northern Wartberg Quarry near Längenau (accessed on October 15, 2017).
