The paper presents brief information on olistostrome accumulations (thickness up to 70 m) in the Lower Cretaceous of the Krizna Nappe (Fatricum, allochthonous unit) within the Central Western Carpathians in the W and NW of Slovakia. Olistostromes are part of sequence deposited in the Zliechov trough with subcontinental crust type in the Jurassic and Cretaceous. They occupy the position between (above) Lower Cretaceous micritic limestones and (below) Albian–Lower Cenomanian sequences (Poruba Flysch Formation, Jablonsky 1988). The main accumulations of olistostromes are farther inside than the main accumulations of the overlying flysch. The origin of the olistostromes is associated with tension tectonics during the remodeling the Zliechov area into a flysch trough before the shift of nappes. It is characteristic of olistostromes that they are poorly sorted, matrix-supported and their material is of intraformational origin. Cleavage of matrix depends upon the clay content. Certain criteria indicate plastic sedimentary deformations, boudinage and textural transition from slides into olistostrome. Olistolites of the 1st and 2th generations (clasts composed of earlier olistostromes) are distinguished.