Deep-seated gravitational deformation; Gravitational spreading; Slope sagging
Sackung is a German term denoting slow, deep-seated gravitational deformation of slopes.
Sackung-type movements have typical surface expression as uphill-facing (antislope) scarps, tension cracks, grabens, and anomalous ridge-top depressions running roughly parallel to the contours in steep mountain topography. Individual scarps, grabens, and cracks (collectively referred to here as “linears”) have a typical relief of 1–10 m and may be traced over distances of 100 m to more than 3 km. Linears may be arranged sub-parallel to one another, or en echelon, and comprise slope-movement complexes covering areas of 1–10 km 2 that are clearly visible on air photographs (Figure 1).
- Bovis, M. J., and Stewart, T. W., 1998. Long-term deformation of a glacially undercut rock slope, southwest British Columbia. In Proceedings of the 8th International Congress on International Association of Engineering Geology, Balkema, Rotterdam, pp. 1267–1276.Google Scholar
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