Word Study
laccolith
CIDE DICTIONARY
laccolith, n. [Gr. a cistern + -lite, -lith.].
A mass of igneous rock intruded between sedimentary beds and resulting in a mammiform bulging of the overlying strata. [1913 Webster]
OXFORD DICTIONARY
laccolith, n. Geol. a lens-shaped intrusion of igneous rock which thrusts the overlying strata into a dome.
Etymology
Gk lakkos reservoir + -LITH
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