Two extensive intratill boulder pavements were identified included at two leveis within a single diarnictite horizon of the Late Paleozoic Itararé Subgroup, in the northem part of the Paraná Basin, Brazil. Measurement of striae on cobbles and boulders of the lower and upper pavements averaged N7SºW and N-S, respectively. Interpretation of local sense of glacier movement was based on the probable upglacier inclination of the upper plane surface of clasts in the pavements, which indicate flows towards N and NW. The general sense of movement was interpreted to have been towards N37ºW. A detailed study of surface characteristics of clasts dispersed in the diarnictites showed that up to 48% of the clasts are striate, mostly in the subparallel fashion. The striae are most commonly oriented parallel with the largest axes of the clasts. A general glacial mode of origin already established for sediments of the Itararé Subgroup in the Paraná Basin is reinforced by the occurrence of the boulder pavements and feature s of diarnictite clasts. The available geological evidences on the origin of the pavements indicate that they may have been formec1 along shear planes inside a basal till.
