Hallway
| Hallway | ||
|---|---|---|
| height | 655 m | |
| location | Karlovarský kraj , Czech Republic | |
| Mountains | Duppau Mountains | |
| Coordinates | 50 ° 15 '14 " N , 13 ° 8' 3" E | |
|
||
| rock | Theralith | |
| particularities | Magma slot of a prehistoric super volcano | |
The Flurbühl (very rarely in Czech Louka ) is an inconspicuous mountain of 655 m nm in the Duppau Mountains in the Czech Republic . It is located in the area of the Hradiště military training area in Okres Karlovy Vary and is not open to the public. The bushy mountain is the magma slot of a tertiary super volcano , the caldera of which forms the Duppau basin.
geography
The Flurbühl is located in the isolated area of the military training area, on its northeast slope was the town of Doupov ( Duppau ) until 1955 . To the north, the mountain is surrounded by the Luční potok ( Pinzichbach ), to the southeast by the Pustý potok ( Grünlesbach or Oedbach ) and in the northeast by the Liboc ( Aubach ). In the southwest it is connected to the foothills of the Oedschloss by a wide flat saddle.
The Flurbühl is dominated in the north by Trmovský vrch ( Dürmauler Mountain , 744 m nm), in the northeast by Jánský vrch ( Johannesberg , 715 m nm), in the east by Doupovské strážiště ( Hutberg , 718 m nm) and Turečský vrch ( Linzberg , 722 m nm), in the southeast from the Dubina ( Eichberg , 730 m nm) and the Zlatá hora ( Goldberg , 721 m nm), in the south from the Prachometský kopec (793 m nm) and Tmavý vrch (857 m nm), im South-west of Pustý zámek ( Oedschloßberg , 933 m nm), in the west of U Studeného dvora (790 m nm) and in the north-west of Ovčí vrch ( Kronberg , 739 m nm) and Huseň ( Hußen , 762 m nm).
history
The slopes of the Flurbühl used to be used as pasture and arable land. On the mountain there was one of St. Trinity Chapel. The rock on the summit was used as a quarry from the end of the 19th century.
Since the resettlement of the area verbuscht the Flurbühl increasingly.
geology
The 20 km² Duppauer Kessel is the caldera of a tertiary super volcano, the Theralith Flurbühl is the remnant of its magma chimney.
It had been recognized earlier that the city of Duppau was located in a volcanic crater. Until the end of the 19th century, however, it was assumed that the Flurbühl was made of hornblende slate . The actual rock structure could be determined by recording quarries on the summit and through some rock heads that protrude up to two meters from the meadow cover of the steep northern slope.
After Johann Baptist Wiesbaur took up the post of grammar school professor at the Duppau grammar school in 1898, he collected rock samples from the area for teaching mineralogy. At Flurbühl, contrary to the information in the geological map, Wiesbaur found no slate, but only hornblende and above all a rock that resembled the diorite that he had collected from 1863 to 1866 on the Tiefen Weg ( Hlboká cesta ) near Pressburg also resembled the rock described by August Emanuel von Reuss as Rongstocker diorite and later identified as Essexite by Josef Emanuel Hibsch . An examination of rock samples by the Viennese mineralogist Friedrich Becke showed that the Flurbühl consisted of Theralith , a rock known up to now only from America, with lighter parts of Eläolithsyenit (= nepheline - syenite ). As a result, Becke carried out intensive rock investigations in 1899 on the Flurbühl. Becke recognized that the Theralith area corresponded almost exactly to the drawing of Hornblende slate on the map of the Reichsanstalt. As deep rock it filled the former crater vent of the super volcano; it slowly solidified in the depths under a high ash cone and thus ended the volcanic eruptions of the tertiary period in the Duppau Mountains. The Liebwerder geologist Hibsch, who was confirmed by Becke in his theory of the formation of the Duppau Mountains from a super volcano, also examined the Flurbühl in 1900. Since, according to his knowledge of volcanism in the Bohemian Central Uplands, the basalt mountains of the Duppau Mountains must mainly consist of tephrite , he examined the area around Duppau and found this rock on the Hußen and in the quarry on the southern slope of the Dürmauler Mountain near the Walksmühle. On the way between Dörfles and Duppau, Hibsch also found a reading stone from Gauteit , the nature of which corresponded entirely to that found in the Elbe Valley near Gaute, and Monchiquit , another volcanic deep rock , on the bone on the road from Duppau to Promuth .
The investigations showed that no hornblende slate can be found anywhere on the Flurbühl. The mountain consists entirely of Theralith and is in places criss-crossed by Nephelian passages, almost all around it is surrounded by Bachalluvia. The area around the Flurbühls is predominantly tephrite, mostly leucittephrite, more rarely hauyntephrite. All around the Flurbühl there are radial corridors of Gauteit and Monchiquit. The Tephrite around Duppau, especially in the east, are often almond stones and contain numerous drusen, mostly very small Phillipsite.
flora
The special geological conditions on the Flurbühl are also the reason for the variety of mountain violets in the hillside meadows.
Individual evidence
- ↑ Older data give a height of 644 m or 648.5 m
- ^ Duppau (Doupov). boehmisches-erzgebirge.cz
- ↑ JB Wiesbaur: III. Original messages - Theralith in the Duppau Mountains. In: Lotos - Journal for Natural Sciences. 49, 1901, pp. 62-71 ( PDF on ZOBODAT ).
- ↑ Rudolf Schuh: The violet flora of the Duppau Mountains. In: General botanical journal for systematics, floristry, plant geography. 13, 1907, pp. 148-150 ( PDF on ZOBODAT ).