MAAR

Maar

A maar is a broad, low-relief volcanic crater that is caused by a phreatomagmatic eruption, which is an explosion caused by groundwater coming into contact with hot lava or magma. A maar characteristically fills with water to form a relatively shallow crater lake. The name comes from the local Moselle Franconian dialect of Daun, where it is in turn derived from Latin mare . 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 across and from deep, and most are ...

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maar

Noun

  1. a broad volcanic crater, usually filled with a lake


The above text is a snippet from Wiktionary: maar
and as such is available under the Creative Commons Attribution/Share-Alike License.

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