Abstract
Slope failure and gully erosion along Little Sandhill Creek, a tributary of the Red Deer River, Alberta, Canada, has exposed large stratigraphic sections in which the effects of glaciotectonism and landsliding are clearly revealed. Six main units are identified ranging from a deposit of coarse fluvial sands, through various glacial diamictons and gravels and sands, to postglacial fluvial and lacustrine (pond) and aeolian sediments. Incision by Little Sandhill Creek since late Wisconsinan deglaciation ca. 12,500 B.P., resulted in periodic landslides culminating in the main slope failure which occurred post ca. 5400 B.P. The slide was reactivated by irrigation water return flow from the adjacent prairie surface.
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