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 of salt dome

First recorded in 1905–10

British Dictionary definitions for salt dome

salt dome

salt plug


noun

a domelike structure of stratified rocks containing a central core of salt: formed by the upward movement of a salt deposit