Definition of maar in English:

maar

Syllabification: maar
Pronunciation: /mär
 
/

noun

Geology
A broad, shallow crater, typically filled by a lake, formed by a volcanic explosion with little lava.
More example sentences
  • Monogenetic volcanoes are small and occur as scoria cones, tuff cones and rings, and maars; they form from single, typically brief eruptions.
  • However, with an initial diameter of about 1,500 m the Messel maar was certainly considerably larger than the Eckfeld Maar.

Origin

early 19th century: from German dialect, originally denoting a kind of crater lake in the Eifel district of Germany.

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