Geol. [f. Gr. λάκκο-ς a reservoir + -LITE. So named by Gilbert in 1877.] A mass of igneous rock thrust up through the sedimentary beds, and giving a dome-like form to the overlying strata.
1877. Gilbert, Rep. Geol. Henry Mts., ii. 19. For this body the name laccolite … will be used.
1896. Pop. Sci. Jrnl., L. 241. These are connected … with Plutonic plugs, laccolites.
Hence Laccolitic a., pertaining to a laccolite.
1877. Dutton, in Gilbert, Rep. Geol. Henry Mts., 69. Laccolitic nuclei.
1879. Nature, XXI. 179. It is not likely that the Henry Mountains are the only ones constructed on the laccolitic type.
