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A mass of igneous rock intruded between layers of sedimentary rock, resulting in uplift.

[Greek lakkos, pond, cistern + -lith.]


(ˈlækəlɪθ) or


(Geological Science) a dome-shaped body of igneous rock between two layers of older sedimentary rock: formed by the intrusion of magma, forcing the overlying strata into the shape of a dome. See lopolith
[C19: from Greek lakkos cistern + -lith]
ˌlaccoˈlithic, laccolitic adj


(ˈlæk ə lɪθ)
a mass of igneous rock formed from magma that spread laterally into a lenticular body, forcing overlying strata to bulge upward.
[1875–80; < Greek lákko(s) pond + -lith]
lac`co•lith′ic, lac`co•lit′ic (-ˈlɪt ɪk) adj.


A lens-shaped mass of intrusive igneous rock that pushes overlying rocks into a dome.
References in periodicals archive ?
Accordingly, these domes might be interpreted as surface manifestations of laccolithic intrusions formed by flexure-induced vertical uplift of the lunar crust (or, alternatively, as low effusive edifices due to lava mantling of highland terrain, or kipukas, or structural features).
Michaut (10,11) shows, based on a numerical model of magmatic intrusions, that the smaller gravity and dryer crust of the Moon would lead to an increase of the characteristic elastic length scale for laccolithic intrusions by a factor of about two, which would explain the systematic differences in size between terrestrial and putative lunar laccoliths.
Peng, "Particle simulation of spontaneous crack generation associated with the laccolithic type of magma intrusion processes," International Journal for Numerical Methods in Engineering, vol.75, no.10, pp.1172-1193, 2008.