Föhrenbühl nature reserve
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NSG Föhrenbühl
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| location | Erbendorf , Tirschenreuth district , Bavaria | |
| surface | 33.73 ha | |
| Identifier | NSG-00131.01 | |
| WDPA ID | 81683 | |
| Geographical location | 49 ° 51 ' N , 12 ° 2' E | |
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| Setup date | 1999 | |
The Föhrenbühl is a nature reserve near Erbendorf in the Upper Palatinate district of Tirschenreuth in Bavaria .
location
The nature reserve is located 2.1 kilometers north of Erbendorf. It is part of the Steinwald Nature Park , the LSG landscape protection area within the Steinwald Nature Park (formerly a protection zone) and the FFH area serpentine sites in the northern Upper Palatinate .
description
The 34 hectare area is a sparsely wooded serpentine ridge . The properties of the bizarrely weathered rock lead to a vegetation that stands out clearly from the surroundings. Relics from the Ice Age and the subsequent warm period have remained there to this day. Similar locations were preferred to be mined in the past, which is why Föhrenbühl is one of the few large-scale serpentinite locations in the country.
Geotope
There is an abandoned quarry in the nature reserve . It is from the Bavarian State Office for the Environment as an important geotope . Soapstone quarry on Föhrenbühl E from Grötschenreuth (377A024) reported. The geotope is one of the 100 most beautiful geotopes in Bavaria. The former soapstone quarry was re-exposed in 2007 and opens up examples of serpentinite and soapstone from the Erbendorf green slate series . Soapstone (talc) was mined in the small quarry, which was ground and used industrially as a ceramic raw material.
Around Erbendorf, the subsoil consists of basic and ultra-basic rocks with very little silica (SiO 2 ). Almost all of them are greenish in color and that is why it is called the Erbendorf Greenschist Zone . The basic parts originated from igneous rocks ( basalts ) of a former oceanic earth crust, the heavy ultrabasic rocks from the earth's mantle below this ocean floor. Some of the serpentinite minerals were later converted into talc and chlorite, which resulted in so-called pot stone deposits, especially in areas of strong tectonic movement . These soft and particularly easy-to-work stones are sought-after raw materials for refractory products and the ceramic industry. They used to be mined in the west of Föhrenbühl and in the Marienstollen north of Erbendorf. During the Variscan orogeny , further rock changes occurred in the Upper Carboniferous about 315 million years ago. Due to the high temperature in the vicinity of the granite, the serpentinites were transformed into serpentinite horn rock, which today mainly forms the ridge area of the Föhrenbühl. Minerals such as olivine , pyroxene and hornblende newly formed during this process give the rock a granular appearance.
In the upper Devonian, about 375 million years ago, different continents collided, pushing parts of the former ocean floor between continental plates and sinking them deep into the earth's crust. Under the influence of heat and pressure in the interior of the earth, the ultrabasic rocks of the earth's mantle turned into serpentinites, while the basaltic rocks of the ocean floor gave rise to green slate and amphibolites . Together with the adjoining green schists and amphibolites to the north, the serpentinite horn rocks of Föhrenbühl form a tectonic scale about one kilometer long. The contact between the ultra-basic and basic rocks, which runs a little north of the Föhrenbühl ridge, probably corresponds to the former boundary between the earth's mantle and the crust of the ocean floor. The special weathering resistance of the serpentinite horn rock led to the formation of the hardened rock, which towers over its surroundings.
The nature reserve was designated on June 28, 1980.
See also
- List of nature reserves in the Tirschenreuth district
- List of landscape protection areas in the Tirschenreuth district
- List of FFH areas in the Tirschenreuth district
- List of geotopes in the Tirschenreuth district
Web links
- www.regierung.oberpfalz.bayern.de, brief information
- Location and extent of the nature reserve in OpenStreetMap
Individual evidence
- ↑ Location of the nature reserve in the Bavaria Atlas (accessed on March 10, 2017).
- ↑ LSG within the Steinwald Nature Park (formerly the protection zone) at protectedplanet.net (accessed on March 10, 2017)
- ↑ 6138372 serpentine sites in the northern Upper Palatinate. (FFH area) Profiles of the Natura 2000 areas. Published by the Federal Agency for Nature Conservation . Retrieved March 10, 2017.
- ↑ FFH serpentine sites in the northern Upper Palatinate at protectedplanet.net (accessed on March 10, 2017)
- ↑ www.regierung.oberpfalz.bayern.de, regulation of the nature reserve (accessed on March 10, 2017)
- ↑ www.lfu.bayern.de, profile of the geotope (accessed on March 10, 2017).
- ↑ www.lfu.bayern.de, Serpentinit-Härtling am Föhrenbühl (accessed on March 10, 2017).
