Diapir Definition

dīə-pîr
noun
A geological structure formed when a mass of material of high plasticity and low density, such as salt, gypsum, or magma, pushes upward into overlying strata.
American Heritage
A dome formation in which the rigid top layers have been split open by pressure from an underlying plastic core.
Webster's New World

(geology) An intrusion of a ductile rock into an overburden.

Wiktionary

Other Word Forms of Diapir

Noun

Singular:
diapir
Plural:
diapirs

Origin of Diapir

  • French from Greek diapeirein to push through dia- dia- peirein to pierce per-2 in Indo-European roots

    From American Heritage Dictionary of the English Language, 5th Edition

  • From Ancient Greek διαπειραίνω (diapeirainō, “to pierce through”).

    From Wiktionary

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