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The failure of high-angle rock slopes was studied in the Schefferville area of Labrador-Ungava. From this it is concluded that the failure of rock slopes took place initially as the result of the external factors — glacial and glaciofluvial action — that created the slope. Through time, residual stress release, joint water pressure, and weathering have perpetuated failure, although it continued on a lesser scale. The traditional explanation —■ that rock-slope failure in this area is the result of frost action — is not supported by this study. Furthermore, it is likely that this conclusion can be extrapolated to other cold areas. The general model of hillslope development in cold areas, which emphasizes the role of frost action in rock-slope failure, may need to be reconsidered.

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