A flysch is a sandstone formation, the word comes from the Swiss German language. Red Sandstone in Wyoming Layered sandstone Sandstone is an arenaceous sedimentary rock composed mainly of feldspar and quartz and varies in colour (in a similar way to sand), through grey, yellow, red, and white. ... Swiss German (Schweizerdeutsch, Schwyzerdütsch, Schwiizerdütsch, Schwyzertütsch) is any of the Alemannic dialects spoken in Switzerland. ...
A flysch is a sandstone formation, the word being borrowed from Swiss German.
Flysch is a relatively archaic term describing syn-orogenic (occurring contemporaneously with mountain building) clastic sedimentation within marine depositional facies.
The flysch is deposited on the landward side of a mountain chain in a foreland basin, in a downwarped (depressed) area of the crust.
FLYSCH, in geology, a remarkable formation, composed mainly of sandstones, soft marls and sandy shales found extending from S.W. Switzerland eastward along the northern Alpine zone to the Vienna basin, whence it may be followed round the northern flanks of the Carpathians into the Balkan peninsula.
Local phases of the Flysch have received special names; it is the "Vienna" or "Carpathian" sandstone of those regions; the "macigno" (a soft sandstone with calcareous cement) of the Maritime Alps and Apennines; the "scagliose" (scaly clays) and "alberese" (limestones) of the same places are portions of this formation.
At several places the upper layers of the Flysch are iron-stained, as in the region of Leman and at the foot of the Dent du Midi; it is then styled the "RedFlysch." Lenticular intercalations of gabbro, diabase, andc., occur in the Flysch in Calabria on the Pyrenees.
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