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单词 maar
释义

maar

/mɑː /
noun Geology
A broad, shallow crater, typically filled by a lake, formed by a volcanic eruption with little lava.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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更新时间:2024/12/22 22:10:31