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rimstone

[rim-stohn] /ˈrɪmˌstoʊn/
noun, Geology
1.
a calcareous deposit forming a dam at the edge or outlet of an overflowing pool of water, as in a cavern.
Origin of rimstone
1925-1930
1925-30; rim + stone
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for rimstone
  • The cave contains rimstone pools and saltpeter deposits.
  • Sometimes the drip water will flow down the walls and over the cave floor creating flowstone or rimstone deposits.

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