A laccolith is a dome-shaped intrusive igneous body that forms when magma is injected between two layers of sedimentary rock, causing the overlying strata to bulge upwards. Laccoliths are significant in understanding the processes of magma emplacement and the formation of igneous rock structures within the Earth’s crust.
Reference: Pollard, D. D., & Johnson, A. M. (1973). “Mechanics of Growth of Some Laccolithic Intrusions in the Henry Mountains, Utah, II: Bending and Failure of Overburden Layers and Sill Formation.” Tectonophysics, 18(3-4), 311-354.