laccolites

These side flows from dikes are termed laccolites, a word which signifies the pool-like nature of the stony mass which they form between the strata.

Outlines of the Earth's History A Popular Study in Physiography Nathaniel Southgate Shaler 1873

The lenses of volcanic rocks by which the domes were upheaved are known as "laccolites," _i. e., _ rock lakes.

Canyons of the Colorado John Wesley Powell 1868

[Footnote 19: These blisters were later called laccolites by G.K. Gilbert after his careful study of the locality.

A Canyon Voyage The Narrative of the Second Powell Expedition down the Green-Colorado River from Wyoming, and the Explorations on Land, in the Years 1871 and 1872 Frederick S. Dellenbaugh