The filling of cavities in Wetterstein limestones of the Plesivec Karst Plateau consists of a banded series of light-coloured graded siltstones and black mudstones of turbidite type. According to plant pollen and spores, the sediments are of Santonian–Campanian age. Sharp bases of beds, graded parallel as well as climbing current-ripple lamination, indicate gradual vanishing of current which deposited these rock. No breaking has been found in the one sets of laminae, which leads to the assumption that they were deposited within a few hours. Thin bedded sequences are accompanied by buried limestone blocks (over 1 ton) fallen from above and representing delapsed structures. The opinion has been presented that suspension gravity currents inflow into empty karst spaces suddenly below groundwater level, where circulation did not exist and a favourable anoxic environment could occur. The sedimentary fill deformed later into synclinal form does not display even the early stage of diagenesis. In view of possible redeposited of pollen and spores, the age of sedimentary fillings as well as its subsequent deformation is uncertain.