Encyclopedia of Natural Hazards

2013 Edition
| Editors: Peter T. Bobrowsky


  • Michael J. BovisEmail author
Reference work entry
DOI: https://doi.org/10.1007/978-1-4020-4399-4_305


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).
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Copyright information

© Springer-Verlag Berlin Heidelberg 2013

Authors and Affiliations

  1. 1.Department of GeographyUniversity of British ColumbiaVancouverCanada