Dreiser Weiher

from Wikipedia, the free encyclopedia
Dreiser Weiher near Dreis-Brück, aerial photo (2015)
View of the Dreiser Weiher

The Dreiser Weiher near Dreis-Brück near Daun in Rhineland-Palatinate is a trough-shaped maar in the Eifel that is up to 1,360 meters long and 1,160 meters wide . It is the second largest Eifelmaar.

Emergence

The dry maar , located on a slope, is one of the Quaternary volcanoes of the West Eifel and is surrounded by a wall between 36 and 120 meters high. Based on the analysis of volcanic tuffs that were ejected from the maar during the eruption and geomagnetic measurements, five tuff fans and four volcanic centers on the edge of the basin were identified. No breakout point could be identified in the center of the maar, which is why the maar was probably created as a burglary funnel. The tuffs of the Dreiser Weiher lie above the deposits of the surrounding volcanoes, so the maar is younger than this. An exact dating of the formation of the maar by means of pollen analysis could not be made in the Dreiser Weiher, as there is no bog here .

So-called olivine bombs from the time of their creation can be found in the area. Due to the many, mostly rarely occurring minerals and rocks, the Dreiser Weiher achieved scientific fame early on. It is not clear whether this is the material of the earth's mantle or whether it is due to magmatic differentiation . The scientific discussion about the origin of the material is still ongoing.

Usage history

The formerly existing Maarsee was drained at the beginning of the 19th century, today the basin is drained through artificial ditches leading to the Ahbach . In the Dreiser Weiher there is a commercially used mineral spring ( Nürburg spring ).

The Dreiser Weiher is part of the Dreiser Weiher nature reserve with Döhmberg and Börchen .

The Dreiser Weiher is a popular flight area for paraglider pilots with exceptionally good thermal conditions all year round.

literature

  • Werner P. D'hein: Vulkanland Eifel. Nature and culture guide, with 26 stations on the "German Volcano Road" . Gaasterland-Verlag, Düsseldorf 2006, ISBN 3-935873-15-8 , ISBN 978-3-935873-15-4 .
  • Wilhelm Meyer: Geology of the Eifel . Schweizerbart'sche Verlagsbuchhandlung, 3rd edition, Stuttgart 1994, ISBN 3-510-65161-8 .

Coordinates: 50 ° 15 ′ 52 ″  N , 6 ° 46 ′ 38 ″  E