Dreienberg
| Dreienberg | ||
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 southern view of the Dreienberg |
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| height | 525 m above sea level NN | |
| location | Hessen , Germany | |
| Mountains | Rhön ( Kuppenrhön ) | |
| Coordinates | 50 ° 52 '31 " N , 9 ° 52' 11" E | |
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| Type | Table Mountain | |
| rock | Shell limestone, basalt | |
| particularities | northernmost mountain of the Rhön, location of the Dreienburg castle ruins | |
The Dreienberg is 525 m above sea level. NN high and at the same time the most northerly mountain of the low mountain range Rhön in the "triangle" Bavaria - Hesse - Thuringia . It belongs to the northern and western part of the Rhön, which is called Kuppenrhön due to its typical landscape , and is located in the Friedewald district in the Hersfeld-Rotenburg district of Hesse .
The name of this table mountain comes from the three elevations on its plateau, this is the main peak in the north ( 525 m above sea level ), the Linsenkuppe in the south ( 515 m ) and the Friedewalder Kuppe ( 511 m ) in the west.
Geographical location
The Dreienberg lies within the Rhön Biosphere Reserve, south-southeast of the core town of the Friedewald community. The districts Lautenhausen , Hillartshausen and Motzfeld follow clockwise around the mountain .
The mountain is located at the point where the Fulda and Werra come closest to each other before their confluence. The Dreienberg and the Landecker Berg to the south form the watershed between the two rivers. The watercourses that arise on the mountain flow from its east side into the Werra and from its west side into the Fulda. The Starkelsbach (Werra tributary) and the Kothebach (over the Solz , flowing into the Fulda) form the transition to the Fulda-Werra-Bergland , which begins here with the Seulingswald .
The cultural monument of the Dreienburg castle ruins is located on the eastern slope of the Linsenkuppe and thus in the southeastern part of the Dreienberg .
geology
The Dreienberg is a table mountain made of limestones of the Lower Muschelkalk , which were deposited during the Middle Triassic in a shallow sea that covered all of Central Europe. The limestone series is on the sand and shales of red sandstone (Lower Triassic), which in the area and at the foot of the mountain Three are pending , but are not involved in the formation of the mountain itself. The shell limestone layers have a total thickness of about 70 meters. On the plateau, Oberer Wellenkalk has been preserved in a narrow strip that stretches from the main summit to the lentil tip. On the mountain slopes sweeps Lower Wellenkalk out.
In the Miocene or Pliocene , the earth's crust of the entire Rhön region was bulged as a result of volcanic activity. On the northern slope of the Friedewalder Kuppe of the Dreienberg volcanic rock ( basalt ) is preserved in the form of an old chimney .
Both limestone and basalt were mined here in the past. The abandoned quarries today offer an insight into the geological structure of the mountain. At Hof Weißenborn, immediately west of the mountain, the so-called Friedewalder sandstone of the middle red sandstone is still mined today .
Nature reserve
The Dreienberg nature reserve is 343 hectares in size. It covers the entire terrain of the mountain and the valley area to the west. The borders there are formed by the Kothebach in the north, the Solz in the west and in the south until just before Motzfeld.
The 245 hectare core zone of the nature reserve only includes the terrain of the mountain. This is the northernmost core zone of the Rhön Biosphere Reserve .