diapir

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Related to diapiric: piercement

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 ?
However, the diapiric core of the hills together with small thickness of the Quaternary cover shows (Fig.
Prehnite pseudomorphs after glauberite are widespread within the diapiric amygdules of the first and second flows.
These investigations led towards the conclusions that the originally developed structure in the compressional tectonic settings was modified by the plastic and diapiric nature of the Pre Cambrian rock salt and features of extensional tectonics have been superimposed on those of compressional tectonics.
1989, Diapiric transfer of melt in Kilauea Iki lava Lake, Hawaii: a quick, efficient process of igneous differentiation: Geological Society of America Bulletin, v.
The salts, which were most likely formed in a single evaporitic basin, at present constitute independent bodies and are characterised by an intense tectonic compression with diapiric folds, sometimes quite close together.
The Ma'reb/Jawf area was mostly covered in sand but included a diapiric salt anticline with some associated bituminous shales.
2008): Diapiric uplift of an MIS3 marine deposit in SW Spain: Implications for Late Pleistocene sea level reconstruction and palaeogeography of the Strait of Gibraltar.
Compare, for example, thermal modelling studies indicating that diapiric ascent of magma in the crust is impossible (Weinberg 1996; Petford 1996) with structural studies of felsic plutons indicating diapir-like emplacement (Sylvester 1964; Paterson and Vernon 1995).