Oslo Graben
GEOLOGIC AREA LOCATED AROUND THE NORWEGIAN CAPITAL OSLO
Oslograben; Oslo Rift; Oslo graben; Oslo rift
The Oslo Graben or Oslo Rift is a graben formed during a geologic rifting event in Permian time, the last phase of the Variscan orogeny. The main graben forming period began in the late Carboniferous, which culminated with rift formation and volcanism, with associated rhomb porphyry lava flows.