Photo 1 - Widened river channel

Along the lower 10 km of Rivière à Mars, large scale erosion of the valley bottom resulted from a combination of concave bank erosion, channel avulsions (change in channel position within the valley bottom), and the reactivation/creation of channels. This produced a broad flood channel, 50-380 m wide which, in places, is many times wider than the pre-flood channel. The post-flood channel also exhibited a multi-channel or braided planform in contrast to the predominantly single-channelled meander planform of the pre-flood river. This photograph shows the wide flood channel and divided morphology of the post-flood Rivière à Mars, looking downstream from. About 5 km from the river mouth. Photograph taken on July 27, 1996 (GSC photograph 1997-42X).