Definition of Old Red Sandstone in English:

Old Red Sandstone


mass nounGeology
  • A series of sedimentary rocks, chiefly red sandstones, belonging to the Devonian system of NW Europe.

    • ‘The Stonehaven Group lies at the base of the Old Red Sandstone in the Midland Valley of Scotland and sits unconformably on the Highland Border Complex.’
    • ‘However, the change in structural dip could reflect synsedimentary tectonics (and hence an intrabasinal unconformity developed entirely within an Old Red Sandstone succession), and the dykes may not be syndepositional.’
    • ‘They concluded that the Bristol Channel Thrust juxtaposes the Devonian of north Devon and the Old Red Sandstone and Carboniferous of South Wales.’