Definition of flysch in English:



mass nounGeology
  • A sedimentary deposit consisting of thin beds of shale or marl alternating with coarser strata such as sandstone or conglomerate.

    • ‘The thickness of the shallow marine formations is up to 150 m, and the bathyal flysch is up to 4 km thick.’
    • ‘Synorogenic flysch deposits were laid down in front of the advancing allochthonous complexes, and were overridden by them.’
    • ‘There, the most widespread Ordovician flysch is the Garin Formation.’
    • ‘The mineralization is hosted by flysch rocks (of Triassic age) cut by dikes.’
    • ‘He interpreted pre-Easdale Subgroup rocks as flysch and subsequent molasse derived from a Knoydartian orogen.’


Mid 19th century: from Swiss German dialect.