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Lias

/ laɪˈæsɪk; ˈlaɪəs /

noun

  1. the lowest series of rocks of the Jurassic system


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Derived Forms

  • Liassic, adjective

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Word History and Origins

Origin of Lias1

C15 (referring to a kind of limestone), C19 (geological sense) from Old French liois, perhaps from lie lees, dregs, so called from its appearance

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