Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
9526063 | Sedimentary Geology | 2005 | 15 Pages |
Abstract
An approximately 1 m thick gypsum bed and its underlying <Â 45 cm dolomite bed with variable soft-sediment deformation structures are described from the Grundgips Member of the Grabfeld Formation (Middle Keuper, Ladinian) in southwestern Germany. The deformation structures are mainly convolutions, folds, cusps, domes and off-shooting dykes and, less common, brecciation or faulting. These deformation structures are interpreted to be caused by liquefaction and/or fluidization of the semiconsolidated sediments by a seismic shock of approximately magnitude 6-7. Palaeoseismicity is thought to be related with a nearby wrench fault system associated with a major suture zone of the Variscan basement.
Related Topics
Physical Sciences and Engineering
Earth and Planetary Sciences
Earth-Surface Processes
Authors
Gerhard H. Bachmann, Mahmoud A.M. Aref,