Dreienberg

Southern view of the three mountain

The three mountain is a 525 m above sea level. NN high and also the most northerly mountain in the located in the " triangle " Bayern-Hessen -Thüringen Central Mountains Rhön. He belongs to the northern and western part of the Rhön, referred because of their typical landscape as Kuppenrhön, and is located in the district Friedewald in the Hessian Hersfeld-Rotenburg district.

The name of this table mountain comes from the three surveys on its plateau, this is the main peaks in the north ( 525 m above sea level. NN ), the optical dome in the south ( 515 m) and the Friedewalder hilltop (511 m ) in the west.

Geographical location

The three mountain is located south -southeast of the core location of the community Friedewald within the Rhön biosphere reserve. Clockwise around the mountain hamlets Lauthausen, Hill Arts Hausen, Motzfeld and the court Weissenborn follow.

The mountain is located at the point where Fulda and Werra come closest before its confluence. The three mountain and the south to land Eckerberg form the watershed between the two rivers. The rivers which rise in the mountains, flowing from its east side in the Werra and from the west side into the Fulda. So the Stärkelsbach (Werra tributary ) and the Kothe Bach forms (via the Solz, flowing down into the Fulda ) the transition to Fulda- Werra- mountain country that begins here with the Seulingswald.

On the eastern slope of the optical dome and thus in the southeast part of the three- Berg is the cultural monument castle ruins Dreiburgenland.

Geology

The three mountain is a table mountain from limestones of the Lower Muschelkalk, which were during the Middle Triassic in a shallow sea that covered the whole of Central Europe, is deposited. The limestone series is on the sand and mudstones of the Buntsandstein ( Lower Triassic), pending in the area and at the foot of three mountain, but are not involved in the formation of the mountain itself. The limestone layers have a total thickness of about 70 meters. On the plateau Upper Wellenkalk is in a narrow strip that runs from the main summit to the optical dome, survived. On the mountain slopes Lower Wellenkalk crosses out.

In the Miocene or Pliocene, the Earth's crust throughout the Rhön region was bulged due to volcanic activity. On the northern slope of the Friedewalder top of the Three Mountain volcanic rock ( basalt) is obtained in the form of an old chimney.

Both limestone and basalt were mined in the past here. The abandoned quarries today offer an insight into the geological structure of the mountain. Am Hof ​​Weissenborn, immediately west of the mountain, the so-called Friedewalder sandstone in the Middle Bunter is mined today.

Nature reserve

The nature reserve three mountain is 343 acres in size. It covers the whole area of the mountain and the valley lying to the west. The boundaries where it forms the Kothe stream in the north, the Solz in the west and in the south to just before Motzfeld.

The 245 -hectare core zone of the reserve includes only the terrain of the mountain. This is the northernmost core zone of the Biosphere Reserve Rhön.