salt-dome

salt dome

noun Geology.
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.
Compare diapir.


Origin:
1905–10

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Collins
World English Dictionary
salt dome or salt plug
 
n
a domelike structure of stratified rocks containing a central core of salt: formed by the upward movement of a salt deposit
 
salt plug or salt plug
 
n

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