Lias

[laiәs]

Definition

(n.) The lowest of the three divisions of the Jurassic period; a name given in England and Europe to a series of marine limestones underlying the Oolite. See the Chart of Geology.

Edited by Jeffrey

Definition

n. (geol.) a formation of argillaceous limestone &c. underlying the oolitic system.—adj. Lias′sic pertaining to the lias formation.

Typist: Randall