diapir

American  

[dahy-uh-peer] / ˈdaɪ əˌpɪər /

noun

Geology.

1. a dome, or anticline, the upper regions of which have been ruptured and penetrated by material squeezed up from below.

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diapir British  

/ ˈdaɪəˌpɪə /

noun

1. geology an anticlinal fold in which the brittle overlying rock has been pierced by material, such as salt, from beneath

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diapir Scientific  

/ dī′ə-pîr′ /

1. A fold or dome, such as an anticline, in which the upper strata of sediment or rock have been ruptured by the upward movement of more plastic rock, such as a body of salt, gypsum, or lava.

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Other Word Forms

• diapiric adjective

Etymology

Origin of diapir

1915–20; < French, said to be < Greek diapeírein to drive through, pierce; dia- dia- + peírein to pierce

Example Sentences

Regardless, when a diapir cools, it forms a mass of intrusive rock called a pluton.

From Textbooks • Jan. 1, 2017

The path of rising magma is called a diapir.

From Textbooks • Jan. 1, 2017

As the temperature drops within a magma diapir rising through the crust, some minerals will crystallize and settle to the bottom of the magma chamber, leaving the remaining melt depleted of those ions.

From Textbooks • Jan. 1, 2017

For example, it is not known what happens to the pre-existing country rock as the diapir intrudes.

From Textbooks • Jan. 1, 2017