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From what I can tell, a latholith is more commonly referred to as a laccolith. This is a geological formation that results from liquid magma rising through an underground crack in the Earth's crust called a dike. The magma is forced up through the dike and collects between two layers of sedimentary rock where it cools to form igneous rock. As a result, the overlying rock layers are pushed upward to form a dome-like shape on the surface called a laccolith (or latholith). One classic example of an eroded laccolith is the Devil's Tower rock formation in Wyoming.
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