Geologic Cracks Record

Examples of sackung mapping (locations in Fig. 1b). a) Sackungen manifest as troughs, scarps, fissures, and benches on ridge crests and upper ridge flanks. b) Sackung features abruptly end at a farming boundary; therefore, sackung mapping is limited to locations where extensive anthropogenic modification is absent. c) Ridge cross-section (location in 2a) showing schematic representation of one possible sackung failure geometry at depth (red lines). Geologic section and location of failure surface based on Jibson and Keefer (1993). Click on image to view larger version.