Flysch

Steeply-tilted layers of flysch on the coast at Zumaia, Spain

Flysch is a sequence of sedimentary rock layers that progress from deep-water and turbidity flow deposits to shallow-water shales and sandstones. It is deposited when a deep basin forms rapidly on the continental side of a mountain building episode. Examples are found near the North American Cordillera, the Alps, the Pyrenees and the Carpathians.

Sedimentological properties

Flysch consists of repeated sedimentary cycles with upwards fining of the sediments. At the bottom of each cycle are sometimes coarse conglomerates or breccias, which gradually evolve upwards into sandstone and shale/mudstone. Flysch typically consists of a sequence of shales rhythmically interbedded with thin, hard, graywacke-like sandstones. Typically the shales do not contain many fossils, the coarser sandstones often have fractions of micas and glauconite.

Other Languages
aragonés: Flysch
català: Flysch
čeština: Flyš
Deutsch: Flysch
Ελληνικά: Φλύσχης
español: Flysch
Esperanto: Fliŝo
euskara: Flysch
فارسی: فلیش
français: Flysch
galego: Flysch
hrvatski: Fliš
italiano: Flysch
ქართული: ფლიში
magyar: Flis
Nederlands: Flysch
norsk nynorsk: Flysch
oʻzbekcha/ўзбекча: Flish
română: Fliș
shqip: Flishi
slovenčina: Flyš
slovenščina: Fliš
српски / srpski: Флиш
srpskohrvatski / српскохрватски: Fliš
svenska: Flysch
українська: Фліш