- GeoRef, Copyright 2004, American Geological Institute. Reference includes data from Bibliography and Index of Geology Exclusive of North America, Geological Society of America, Boulder, CO, United States
In the Glomfjord region on the west coast of Norway, the Sokumfjell marble group consists of a gray and a yellow impure marble adjacent to the Sandvand schist, with which it is folded into east-plunging folds. Within the gray marble, folds are completely closed structures of elliptical outcrop lying between layers whose form is that of a normal fold. The explanation of fold interference does not always apply, and the most likely alternative would seem to be non-cylindroidal deformation and differential movement along the fold axial planes.