diapir(redirected from Piercement structure)
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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.
[French, from Greek diapeirein, to push through : dia-, dia- + peirein, to pierce; see per- in Indo-European roots.]
(Geological Science) geology an anticlinal fold in which the brittle overlying rock has been pierced by material, such as salt, from beneath
[C20: from Greek diapeirainein to make holes through, pierce]
an anticline of rock the upper regions of which have been penetrated by material from below.
[1915–20; < French < Greek diapeírein to drive through]
di`a•pir′ic (-ˈpɪr ɪk) adj.
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|Noun||1.||diapir - a domed rock formation where a core of rock has moved upward and pierced through the more brittle overlying strata|
geology - a science that deals with the history of the earth as recorded in rocks