Sedimentation in the basins of the Flysch Belt is recorded since the Upper Jurassic period up to Oligocene resp. beginning of Miocene. Basins of the Flysch zone were formed in the Middle Jurassic — Lower Cretaceous period of post-rift subsidence. During the Upper Cretaceous—Palaeocene time inversion locally occurred. In the most areas subsidence continued through the Palaeocene to Middle Eocene. Synorogenic closing of the basins followed in Upper Eocene–Lower Miocene.Oszczypko, N., 2004, The structural position and tectonosedimentary evolution of the Polish Outer Carpathians. Przegląd Geologiczny, vol. 52, no. 8/2, pp. 780-791 Nappes are mostly composed of turbidites – alternating sandstones and claystones.
