Clastic sedimentary rocks in the vicinity of Mrzle Vodice in the Gorski kotar region contain numerous Upper Palaeozoic fossils, preserved as skeletal detritus in caiclithites, or within lithoclasts in coarse-grained sediments. Seventy-two taxa have been determined (most of them for the first time) in this region. The most abundant groups are foraminifers and calcareous algae. Calcisponges, echinoderms and bryozoans occur frequently, while remnants of molluscs, brachiopods and ostracods are scarce. The determined taxa range from the Lower Carboniferous (Visean), through ths Upper Carboniferous (Moscovian, Kasimovian, Gzhelian), up to the Lower Permian (Asselian) in age. Some of the clastic sediments show traces of the multiple redeposition.