Bible Dictionaries
Trias
Webster's Dictionary
(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.
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Bibliography Information
Webster, Noah. Entry for 'Trias'. Noah Webster's American Dictionary. https://www.studylight.org/dictionaries/eng/web/t/trias.html. 1828.