Lī'as, n.
n. [Fr. lias.] (Geol.) A stratum of the middle secondary age, lying beneath the oölite; a species of limestone occurring in horizontal strata, belonging to the lias formation. [Dana.
n. [Fr. lias.] (Geol.) A stratum of the middle secondary age, lying beneath the oölite; a species of limestone occurring in horizontal strata, belonging to the lias formation. [Dana.