Differential weathering of paleosurfaces in upper Carboniferous sandstone of southern Morocco has exposed arcuate ridges and swales that record point-bar accretionary events. From the point-bar ridges and swales, paleohydraulic and paleogeographic data have been gathered that define an array of late Carboniferous rivers with moderate discharges calculated to be from 130 to 565 m3/sec. The broad sinuous channels flowed toward the east-southeast; the distance from the source terrain to the sea was about 100 km. Channel slope was approximately 0.16 m/km.

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