diapir


di·a·pir

noun \ˈdī-ə-ˌpir\

Definition of DIAPIR

:  an anticlinal fold in which a mobile core has broken through brittle overlying rocks
di·a·pir·ic \ˌdī-ə-ˈpir-ik\ adjective

Origin of DIAPIR

French, probably from Greek diapeirein to drive through, from dia- + peirein to pierce; akin to Greek poros passage — more at fare
First Known Use: 1918

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