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salt dome

noun

, Geology.
  1. a domelike rock structure that is formed beneath the earth's surface by the upward movement of a mass of salt, may reach thousands of feet in vertical extent, and is more or less circular in plan: often associated with oil and gas pools.

salt dome

noun

  1. a domelike structure of stratified rocks containing a central core of salt: formed by the upward movement of a salt deposit
“Collins English Dictionary — Complete & Unabridged” 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word History and Origins

Origin of salt dome1

First recorded in 1905–10

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salt codSalteaux

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