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

Word History and Origins

Origin of salt dome¹

First recorded in 1905–10