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WordReference Random House Unabridged Dictionary of American English © 2024salt′ dome′, [Geol.]- Geologya 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. Cf. diapir.
Collins Concise English Dictionary © HarperCollins Publishers:: salt dome, salt plug n - a domelike structure of stratified rocks containing a central core of salt: formed by the upward movement of a salt deposit
di•a•pir (dī′ə pēr′),USA pronunciation n. [Geol.]- Geologya dome, or anticline, the upper regions of which have been ruptured and penetrated by material squeezed up from below. Cf. plume (def. 10), salt dome.
- Greek diapeírein to drive through, pierce; dia- dia- + peírein to pierce
- French, said to be
- 1915–20;
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