Flysch
Flysch (
Sedimentological properties
Flysch consists of repeated sedimentary cycles with upwards
Tectonics
In a continental collision, a subducting tectonic plate pushes on the plate above it, making the rock fold, often to the point where thrust faults form, and a mountain chain rises. On the upper plate, the land between the mountains and the undeformed continent bends downward, forming a foreland basin. If the basin forms slowly, as in the northern Appalachians, it fills with shallow-water sediments.[3] If it forms rapidly, as in the east side of the North American Cordillera, then sea water may rush in, and the first sedimentary deposits are deep water deposits. If the mountain slope is steep enough at the edge of the basin, it will shed material in rapidly moving sedimentary flows called turbidity currents, resulting in turbidite deposits. As the basin fills up, shallow-water sandstones and continental deposits form.[3][4] Most of the resulting rocks have little deformation, but near the edge of the mountain chain they can be subject to folding and thrusting.[3] After the basin fills up, continental sediments (molasse) are deposited on top of the flysch.[4]
Name and use
The name flysch was introduced in geologic literature by the
The name flysch is currently used in many mountain chains belonging to the Alpine belt. Well-known flysch deposits are found in the
References
- ^ "Urola Kosta: Things to do in Orio, Zarautz, Getaria and Zumaia | Bodega Katxiña". Retrieved 2023-07-03.
- ^ "La ruta del Flysch, un viaje distinto al País Vasco - Vipealo" (in Spanish). 2020-12-11. Retrieved 2023-07-03.
- ^ ISBN 0716724375.
- ^ ISBN 9783540661931.
- ISBN 3-7225-0007-9.
Further reading
- Chisholm, Hugh, ed. (1911). . Encyclopædia Britannica. Vol. 10 (11th ed.). Cambridge University Press. p. 586.
- Stanley, Steven M. (2005). Earth System History (2nd ed.). New York: Freeman. ISBN 9780716739074.
