diapir

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diapir

[′dī·ə‚pir]
(geology)
A dome or anticlinal fold in which a mobile plastic core has ruptured the more brittle overlying rock. Also known as diapiric fold; piercement dome; piercing fold.
References in periodicals archive ?
Because the type section was deposited on the flank of the Minudie Anticline, it may have occupied a subtle paleotopographic high that was inundated only by the largest flooding events or that was syndepositionally uplifted by diapirism as fluvial sediment prograded into the basin (Coleman 1988; Davison et al.
Foliation developed during diapirism and ballooning would tend to concentrate along the margins of the pluton, which contrasts with the relatively uniform occurrence of foliation throughout the Main Zone.
1982, On the mechanisms of igneous diapirism, stoping and zone melting: American Journal of Science, v.