diapir

noun
di·a·pir | \ˈdī-ə-ˌpir \

Definition of diapir 

: an anticlinal fold in which a mobile core has broken through brittle overlying rocks

Other Words from diapir

diapiric \ˌdī-ə-ˈpir-ik \ adjective

First Known Use of diapir

1918, in the meaning defined above

History and Etymology for diapir

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

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The first known use of diapir was in 1918

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