Possible oblique-slip faulting 1n the Skagerrak Graben , as interpreted from high resol uti on sei smic data

to the east where the fault zone bends in an E-W trend it appears to be the reverse, with indications of compression. These observations lead to the interpretation that the deformed zone is the result of sinistral oblique-slip movements during the late Paleozoic. The observations appear to fil with the regional situation associated with the formation of the Oslo Graben in the late Carboniferous. East-west extension, which caused the normal faulting in the Oslo Graben, could have led to oblique-slip movements along an existing zone of weakness striking NE-SW where the movements would be sinistral.