What does "diapir" mean?

An intrusion of a ductile rock into an overburden.

How do you pronounce "diapir"?

Pronounced //ˈdaɪ.ə.pɪə(ɹ)//.

Common synonyms include: buoyant intrusion, diapirism, geologic disruption, geologic feature, intrusion, salt dome.

/ˈdaɪ.ə.pɪə(ɹ)/ noun

noun ·Rare ·Advanced level

Noun

1
An intrusion of a ductile rock into an overburden.
""If a diapir is outside an established plume it rises at a much slower rate," Loper says."
2
a domed rock formation where a core of rock has moved upward and pierced through the more brittle overlying strata wordnet

""If a diapir is outside an established plume it rises at a much slower rate," Loper says."

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