maar

[mahr]

maar

[mahr]
noun Geology.
a circular volcanic landform resulting from explosive ash eruptions.

Origin:
1820–30; < German Maar a depression filled with standing water (especially in the Eifel district)
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Maar is always a great word to know.
So is infiltration. Does it mean:
portion of the earth's surface consisting of disintegrated rock and humus
seepage of water into soil or rock
Collins
World English Dictionary
maar (mɑː)
 
n , pl maars, maare
(sometimes capital) a coneless volcanic crater that has been formed by a single explosion
 
[C19: from German]

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Science Dictionary
maar   (mär)  Pronunciation Key 
A broad, shallow, generally flat-floored volcanic crater that is often filled with water. Maars usually form from explosive eruptions caused by the heating and boiling of groundwater that is invaded by rising magma.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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