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.

Nearby words

  1. salt bath,
  2. salt cake,
  3. salt cedar,
  4. salt chuck,
  5. salt cod,
  6. salt flat,
  7. salt gland,
  8. salt glaze,
  9. salt grass,
  10. salt hay

Compare diapir.

Origin of salt dome

First recorded in 1905–10 Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for salt dome

salt dome

salt plug


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