page_title: Maar
section_title: Dry maars of the Eifel
hierarchical_section_title: Maar / Examples / Germany / Eifel maars / Dry maars of the Eifel
caption_attribution_description: Deutsch: Trockenmaar am Hohen List
context_page_description: A maar is a broad, low-relief volcanic crater caused by a phreatomagmatic eruption. A maar characteristically fills with water to form a relatively shallow crater lake which may also be called a maar. The name comes from a Moselle Franconian dialect word used for the circular lakes of the Daun area of Germany.
  Maars are shallow, flat-floored craters that scientists interpret as having formed above diatremes as a result of a violent expansion of magmatic gas or steam; deep erosion of a maar presumably would expose a diatreme. Maars range in size from 60 to 8,000 m across and from 10 to 200 m deep; most maars commonly fill with water to form natural lakes. Most maars have low rims composed of a mixture of loose fragments of volcanic rocks and rocks torn from the walls of the diatreme.
context_section_description: In the Eifel and Volcanic Eifel there are numerous dry maars:
  Mosbrucher Weiher (4 km SE of Kelberg)
  Booser Doppelmaar (W of Boos; near Kelberg)
  Dreiser Weiher (W of Dreis-Brück, N of Daun)
  Dürres Maar (SW of Gillenfeld)
  Duppacher Weiher (near Duppach, NW of Gerolstein)
  Geeser Maar (E of Gerolstein, N of Gees)
  Eckfelder Maar (near Eckfeld)
  Eigelbacher Maar (near Kopp, county of Daun; maar basin: c. 1200 m × 1200 m)
  Hitsche Maar (NW of the Dürre Maar, smallest Eifel maar; Ø = 60 m)
  Immerather Risch (Middle Low German: risch = reed bed; N of the Immerather Maar)
  Gerolsteiner Maar (NE of Gerolstein)
  Schalkenmehrener Maar E (of Schalkenmehren)
  Schönfelder Maar (SW of Stadtkyll-Schönfeld)
  Steffelner Laach or "Laach Maar" (near Steffeln)
  Dehner Maar (near Reuth)
  Walsdorfer Maar ("Schilierwiese"; S of Walsdorf; maar basin: c. 1150 m × 1000 m)
  Wollmerather Maar (near Wollmerath)
caption: The Trockenmaar on the Hohe List
  (1 km SW of Schalkenmehren)
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