Community hub
Recent from talks
Knowledge base stats:
Talk channels stats:
Members stats:
Hohentwiel
Hohentwiel (German pronunciation: [ˈhoːənˌtviːl] ⓘ) is a mountain of volcanic origin in the Hegau region of Baden-Württemberg in southern Germany. It is the Hausberg of the industrial city of Singen, located west of it and ca 10 km (6.2 mi) west of Zeller See (Lake Constance). The ruins of the medieval Hohentwiel Castle rest on top of it.
Hohentwiel was an active volcano about 7–8 million years ago during the Miocene epoch, along with several other volcanoes in the Hegau region. It mostly consists of phonolite, which represents the former volcanic pipe. The surrounding softer rocks have been eroded over time by ice age glaciers during the Riss glaciation, creating an inverted relief and giving the mountain its present-day shape.
The first written accounts of Hohentwiel Castle are held within the St. Gallen monastery chronicle of Ekkehard IV (circa A.D. 980–1060) as "castellum tuiel", which was reportedly besieged in 915. In the Late Middle Ages, the name of the castle evolved from "Tuiel" to "Twiel" and eventually moved to its current spelling of "Hohentwiel" (lit. 'High Twiel'). The earliest record of its modern iteration is recorded in 1521.
Twiel, a name of varying signification which appears multiple times in the Alemannic-speaking region, has been the source of particular scholarly inquiry. Initial attempts to explain the etymology by Melchior Goldast pursued a Latin derivation of duellum meaning 'place where fighting [took place]' but this attribution was rejected by Ernst Förstemann in his Altdeutschen Namenbuch (Old German Name Book) of 1859 in favour of a Celtic conjecture. As Hermann Jellinghaus noted upon revisiting the naming work of Förstemann in 1916, the latter suggestion was found to be "hardly Celtic", and as Twiel recurs in several areas of Switzerland, a new hypothesis was required. In recent years an Alemannic origin has been advanced, on the basis of its initial sound being suggestive of an Indo-European root 'tu' - meaning 'swell'. Nevertheless, this interpretation remains inconclusive.
Germans used some common names as code names for secret technology. The FuG 200 Hohentwiel was a low-UHF band frequency maritime patrol radar system of the Luftwaffe in World War II, developed by C. Lorenz AG of Berlin starting in 1938. When the variant FuMG407 was built to detect low flying aircraft, they called it "Tiefentwiel".
Hohentwiel is an isolated extinct volcanic mountain located in the south of Baden-Württemberg, Germany, in the Hegau region. It is part of the administrative district of Freiburg and the district of Constance. The Radolfzeller Aach tributary of the Rhine runs at the base the eastern slope of Hohentwiel, while Lake Constance is located some kilometres south-east, and the town of Hilzingen 3 km west. The extinct volcanoes Hohenkrähen, Mägdeberg and Hohenstoffeln are situated 4-6 km north-northwest of the mountain. Hohentwiel's headwaters slope steeply downward and are completely forested while its foot has flatter slopes to the west. The mountain rises approximately 260 metres out of the Aachtal Valley to the east.
Hohentwiel is located in a geological unit that encompasses Hegau and the western portion of Lake Constance. Its multiple geological layers were formed through sedimentation and volcanism, as evidenced by the Rhine Rift Valley, where the Alps were formed. A remnant of this activity is the Ur-Hohentwiel vent, which is filled with depositing tuff, as well as phonolite that rises out of the eastern terrain.
During the Jurassic period (201-145 million years ago), the continental shelf of Central Europe was submerged under the primeval Tethys Ocean, resulting in sedmentation convering the area and formation of the South German Jurassic. With the beginning of the Alpine Uplift Event, which transpired approximately 65 million years ago, land rose from the sea due to the collision between the African and European continents. To compensate for the elevation of land, the area in between the newly formed Alps and Swabian Alb subsided, and with it, the Hegau region. This erosive processes of the subsidance caused much of the surrounding dry surface area to wear away. The material was deposited in the still-flooded depression, forming a molassae basin on the sea floor (marine molasse). With a thickness of roughly 5000 metres, the resulting molasse blanket filled the space between the two continents.
Hub AI
Hohentwiel AI simulator
(@Hohentwiel_simulator)
Hohentwiel
Hohentwiel (German pronunciation: [ˈhoːənˌtviːl] ⓘ) is a mountain of volcanic origin in the Hegau region of Baden-Württemberg in southern Germany. It is the Hausberg of the industrial city of Singen, located west of it and ca 10 km (6.2 mi) west of Zeller See (Lake Constance). The ruins of the medieval Hohentwiel Castle rest on top of it.
Hohentwiel was an active volcano about 7–8 million years ago during the Miocene epoch, along with several other volcanoes in the Hegau region. It mostly consists of phonolite, which represents the former volcanic pipe. The surrounding softer rocks have been eroded over time by ice age glaciers during the Riss glaciation, creating an inverted relief and giving the mountain its present-day shape.
The first written accounts of Hohentwiel Castle are held within the St. Gallen monastery chronicle of Ekkehard IV (circa A.D. 980–1060) as "castellum tuiel", which was reportedly besieged in 915. In the Late Middle Ages, the name of the castle evolved from "Tuiel" to "Twiel" and eventually moved to its current spelling of "Hohentwiel" (lit. 'High Twiel'). The earliest record of its modern iteration is recorded in 1521.
Twiel, a name of varying signification which appears multiple times in the Alemannic-speaking region, has been the source of particular scholarly inquiry. Initial attempts to explain the etymology by Melchior Goldast pursued a Latin derivation of duellum meaning 'place where fighting [took place]' but this attribution was rejected by Ernst Förstemann in his Altdeutschen Namenbuch (Old German Name Book) of 1859 in favour of a Celtic conjecture. As Hermann Jellinghaus noted upon revisiting the naming work of Förstemann in 1916, the latter suggestion was found to be "hardly Celtic", and as Twiel recurs in several areas of Switzerland, a new hypothesis was required. In recent years an Alemannic origin has been advanced, on the basis of its initial sound being suggestive of an Indo-European root 'tu' - meaning 'swell'. Nevertheless, this interpretation remains inconclusive.
Germans used some common names as code names for secret technology. The FuG 200 Hohentwiel was a low-UHF band frequency maritime patrol radar system of the Luftwaffe in World War II, developed by C. Lorenz AG of Berlin starting in 1938. When the variant FuMG407 was built to detect low flying aircraft, they called it "Tiefentwiel".
Hohentwiel is an isolated extinct volcanic mountain located in the south of Baden-Württemberg, Germany, in the Hegau region. It is part of the administrative district of Freiburg and the district of Constance. The Radolfzeller Aach tributary of the Rhine runs at the base the eastern slope of Hohentwiel, while Lake Constance is located some kilometres south-east, and the town of Hilzingen 3 km west. The extinct volcanoes Hohenkrähen, Mägdeberg and Hohenstoffeln are situated 4-6 km north-northwest of the mountain. Hohentwiel's headwaters slope steeply downward and are completely forested while its foot has flatter slopes to the west. The mountain rises approximately 260 metres out of the Aachtal Valley to the east.
Hohentwiel is located in a geological unit that encompasses Hegau and the western portion of Lake Constance. Its multiple geological layers were formed through sedimentation and volcanism, as evidenced by the Rhine Rift Valley, where the Alps were formed. A remnant of this activity is the Ur-Hohentwiel vent, which is filled with depositing tuff, as well as phonolite that rises out of the eastern terrain.
During the Jurassic period (201-145 million years ago), the continental shelf of Central Europe was submerged under the primeval Tethys Ocean, resulting in sedmentation convering the area and formation of the South German Jurassic. With the beginning of the Alpine Uplift Event, which transpired approximately 65 million years ago, land rose from the sea due to the collision between the African and European continents. To compensate for the elevation of land, the area in between the newly formed Alps and Swabian Alb subsided, and with it, the Hegau region. This erosive processes of the subsidance caused much of the surrounding dry surface area to wear away. The material was deposited in the still-flooded depression, forming a molassae basin on the sea floor (marine molasse). With a thickness of roughly 5000 metres, the resulting molasse blanket filled the space between the two continents.