Trias

[traiәs]

Definition

(n.) The formation situated between the Permian and Lias, and so named by the Germans, because consisting of three series of strata, which are called in German the Bunter sandstein, Muschelkalk, and Keuper.

Checker: Seymour

Definition

n. (geol.) the oldest group of the Mesozoic or Secondary strata formerly associated with the Permian rocks under the name of the New Red Sandstone.—adj. Trias′sic.

Typist: Nora