Maar volcanoes Maar volcanoes The Ardennes (pronounced ar-DEN) is a region of extensive forests and rolling hill country, primarily in Belgium and Luxembourg, but stretching into France (lending its name to the Ardennes département and the Champagne-Ardenne région). ...more on Wikipedia about "Ardennes"
The Eifel is a hilly region in Germany. It occupies parts of southwestern North Rhine-Westphalia and northwestern Rhineland-Palatinate. ...more on Wikipedia about "Eifel"
Kilbourne Hole is a Maar volcanic crater, located 30 miles west of the Franklin mountains of El Paso, Texas, in Doña Ana County, New Mexico. The hole is a rare example of volcanic action without a mountainous rim. The theory of formation is that a volcanic eruption occurs in the presence of ground waters, beneath the surface of the earth. As the hot lava and magma encounter the waters, a huge bubble of steam is produced, which blows out a large crater; thus, it is not necessary for the lava and magma to build up a mountainous deposit. The crater is thought to be 80,000 years old . ...more on Wikipedia about "Kilbourne Hole"
Lake Nyos is a crater lake in the Northwest Province of Cameroon, located at . Nyos is a deep lake high on the flank of an inactive volcano near Mount Oku, along the Cameroon Line of volcanic activity. A natural dam of volcanic rock hems in the lake waters. ...more on Wikipedia about "Lake Nyos"
A Maar (from Latin mare: the sea; also called "tuff cone") is a broad, low relief crater that is caused by a phreatic eruption or explosion caused by groundwater contact with hot lava or magma. The maar typically fills with water to form a relatively shallow crater lake. ...more on Wikipedia about "Maar"
The Swabian Alb ( German: Schwäbische Alb) is a plateau in Baden-Württemberg, Germany, extending 220 km from southwest to northeast and 40 to 70 km in width. It occupies the region bounded by the Danube in the south and the upper Neckar in the north. In the southwest it rises to the higher mountains of the Black Forest. The highest mountain of the Swabian Alb is the Lemberg (1015 m). The Alb's profile resembles a high plateau, which slowly falls away to the east. The western edge is a steep cliff (called the Albtrauf or Albanstieg, rising up 300 m, covered with forests), while the top is flat or gently hilled. ...more on Wikipedia about "Swabian Alb"
From Miller and others (1998): "Ukinrek Maars are a pair of ...more on Wikipedia about "Ukinrek Maars"
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