a dome-shaped body of igneous rock between two layers of older sedimentary rock: formed by the intrusion of magma, forcing the overlying strata into the shape of a dome
lopolith
Derived forms
laccolithic (ˌlaccoˈlithic) or laccolitic (ˌlækəˈlɪtɪk)
adjective
Word origin
C19: from Greek lakkos cistern + -lith
laccolith in American English
(ˈlækəˌlɪθ)
noun
a dome-shaped, irregular formation of intrusive igneous rock found between layers of sedimentary rock