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
Words nearby salt dome
salt bath,
salt cake,
salt cedar,
salt chuck,
salt cod,
salt dome,
salt flat,
salt gland,
salt glaze,
salt grass,
salt hay
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