A study of cross-bedding in the southern part of the Huronian outcrop belt indicates that the sediments were transported in a southerly direction (vector mean 160°). Symmetrical ripple marks show a similar preferred orientation (178°), and, together with dessication cracks, indicate shallow water conditions. Dimensional fabric of embedded clasts in massive polymictic conglomerates of the Gowganda Formation probably reflects glacial transport in a southerly direction. Clastic dykes in the Espanola and Serpent Formations are interpreted as injection structures from the underlying Bruce conglomerate. The dykes and ball and pillow structures may indicate tectonic instability during sedimentation. In the Cobalt-Gowganda area both directional sedimentary structures and preferred orientation of clasts in the Gowganda conglomerates indicate a southerly direction of transportation. A study of cross-bedding in the region around the Sudbury Basin suggests the presence of a positive area there in early Huronian times. In the Bruce Mines-Blind River area dimensional fabric of the Gowganda conglomerates suggests that the glaciers moved in a northeast-southwest direction in response to a regional palaeoslope. However, directional structures in associated waterlaid sediments indicate transport to the southeast, possibly reflecting a local southeasterly slope in the Huronian sedimentary basin. The presence of flute casts, groove casts, and graded bedding in the waterlaid sediments of the Gowganda Formation suggests the possibility of the activity of turbidity currents, but many other lines of evidence support a glacial origin for the conglomerates and laminated argillites.