Series of long, sinuous and subparallel furrows on bedding planes of rhythmites of the Itararé Subgroup (Early Permian), cropping out in the State of Santa Catarina, southem Brazil, are interpreted as iceberg scours. Troughs are associated with abundant ice-rafted clasts, pellets and mounds of dumped debris melted out from floating icebergs, and lenses of debris possibly released from grounded icebergs. Rhythmites were deposited in a sizeable, relatively deep freshwater body, at least in part as varves, during the last episode of deglaciation of the late Paleozoic glaciation. Iceberg scours are common in modem and Pleistocene glaciated shelves, but are not known from the ancient record despite selective preservation of glaciomarine rocks. This paper presents the fírst detailed description of iceberg scours from pre-Pleistocene strata
