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 ?
Some crustal rocks are entrained into the serpentine diapirs as they rise, resulting in a mixed sample of rocks from all crustal levels.
When halokinetic subsidence exceeds the rate of sediment supply, actively rising diapirs can develop tens to hundreds of metres of topographic relief and deflect nearby fluvial systems (Al-Zoubi and ten Brink 2001; Banham and Mountney 2013, 2014).
For example, mud volcanoes associated with the diapirs periodically erupt.
Diapirs may have been formed due to diapir-inducing load caused by glacier ice and/or earlier deposited thick overburden.
The EFG is a deep reef atop a salt diapir (Bright & Powell 1983, Gardner et al.
Ainsi, l'ascension de diapirs a partir d'une grande accumulation de magma moins dense que l'encaissant est-il un phenomene important dans la croute inferieure ductile.
Although some questions remain concerning their formation and evolution, they are generally considered to be the result of rising plumes of magma (diapirs) which reach the surface, push the crust upward, and then collapse (like a badly cooked souffle) after the diapir cools (Basilevsky and Head, 2003).
Recent ocean drilling penetration of serpentine diapirs and volcanoes in the Mariana forearc (leading edge of the Eurasian plate, in the Philippine Sea) documents intermixed blocks of mid-ocean ridge basalt and blueschist.
Single-well mechanical earth models were incorporated into Petrel workflow processes to capture the complex stresses and heterogeneities associated with the salt diapirs around the Mittelplate reservoir.
Salt diapirs, salt brine seeps, pockmarks and surficial sediment creep and slides in the Canary Channel off NW Africa.