Old red sandstone

a thick sequence of sedimentary rock (generally, but not always, red) deposited in Britain and NW Europe during the Devonian period
(in Britain) another term for Devonian


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  • Old-river

    noun 1. a river bed left dry because the river has changed its course.

  • Old-rose

    noun 1. rose color with a purplish or grayish cast. noun 1.

  • Old-russian

    noun 1. Russian as used in documents before 1600. Abbreviation: ORuss.

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