Definition of diapirism in US English:

diapirism

noun

Geology
  • See diapir

    • ‘One of the most impressive manifestations of salt diapirism is where diapirs emerge at the present surface as a glacier of pure salt, moving at rates of between ten and one hundred metres per thousand years.’
    • ‘Uplift would result from resultant mantle upwelling or asthenospheric diapirism.’
    • ‘Attempting to provide a purely terrestrial explanation for the central uplift, 1 have suggested that it could have been caused by reactive diapirism of the Lower Jurassic succession beneath an extending Cretaceous cover.’
    • ‘This can be related to shearing along the decollement during underthrusting or to mud diapirism.’
    • ‘Reactive diapirism in Lower Jurassic shales may have contributed to the formation of a central uplift at base Cretaceous level.’

Pronunciation

diapirism

/-ˌizəm/