| trias | <geology> 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. Origin: L, triad. See Triad. Source: Websters Dictionary (01 Mar 1998) |
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| triassic | <geology> Of the age of, or pertaining to, the Trias. The Triassic formation. Source: Websters Dictionary (01 Mar 1998) |
| jura-trias | <geology> A term applied to many American Mesozoic strata, in which the characteristics of the Jurassic and Triassic periods appear to be blended. Jura-trias"sic. Source: Websters Dictionary (01 Mar 1998) |
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