Exotics-bearing layer in the Oligocene flysch of the Krosno Beds in the Fore-Dukla Zone (Silesian Nappe, Outher Carpathians), Poland - Bąk, Krzystof; Dziubińska, Beata; Garecka, Małgorzata; Machaniec, Elżbieta; Rubinkiewicz, Jacek