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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.