sedimentary basins Rift basins - Structural aspects -
Classical example: Viking Graben in the North Sea : Triassic and Jurassic sedimentary strata have been rotated between subparallel high-angle listric faults. The faults can be traced deep into the crust and are not bounded by a detachment surface. At the time when these faults formed they reached a depth at which the crust was hot enough to deform by ductile flow, causing sub-horizontal reflections in the lower crust.
Present day section
Backstripping of post-rift stratigraphy
Bathymetry at a key point in the syn-rift stratigraphy
© Geological Survey of Denmark & Greenland
© Alastair Beach Associate