Journal
INTERNATIONAL JOURNAL OF EARTH SCIENCES
Volume 101, Issue 1, Pages 351-363Publisher
SPRINGER
DOI: 10.1007/s00531-010-0633-z
Keywords
Soft-sediment deformation; Late Pleistocene; Isostatic rebound; Earthquakes; Liquefaction
Categories
Funding
- German Science Foundation (DFG) [HO 2550/8-1]
- Inst. of Geography
- Geology of Ernst-Moritz-Arndt University Greifswald
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A 1,460-m-long profile of a Late Glacial subglacial, glacio-fluvial, glacio-limnic and glacio-deltaic sequence exposed at a cliff section on Usedom Island (SW Baltic Sea coast) is described. The sequence is up to 31 m thick and shows sedimentary structures typical of a glacial setting. Soft-sediment deformation is encountered and is associated with changes in lithology. These deformations include liquefaction, slumping, and faulting. As the most plausible cause, earthquake-induced shaking is discussed. The associated neotectonic activity is seen as a consequence of the postglacial isostatic crustal rebound. As the deglaciation earthquake ratio diminishes with time and as the rebound is phasing out, no large earthquakes are anticipated for northern Germany, although in conclusion the lithosphere of the North German Basin has to be regarded as weakened by repeated ice loading and deloading.
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