lac·co·lith (l k  -l th )n. A mass of igneous rock intruded between layers of sedimentary rock, resulting in uplift. [Greek lakkos, pond, cistern + -lith.] |
| laccolith (lk-lth) A body of igneous rock intruded between layers of sedimentary rock, resulting in uplift. Laccoliths are usually plano-convex in cross-section, having a flat bottom and a convex top, and are roughly circular in plan. They are usually connected to a dike and are typically up to 8 km (5 mi) in diameter and tens to hundreds of meters thick. See illustration at batholith. |
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