Fantastic folding structures in banded gneiss have come to light in road cuts along the new road from Toftøyna, just north of the intersection to Vik. Such structures give a dramatic picture of the strong forces that once were at work deep down under the earth's crust. Similar folding is seen several places in the gneisses west and northwest of Bergen, in the area where the gneiss layers now stand on edge. The folds are a result of movements in the bedrock at the end of the Caledonian Mountain Building event. Then, these layers lay at great depth, where they got turned on their sides and squeezed together into fine folds. Most often, the layers are quite flat-lying in Øygarden, with a gentle slope toward the east.
Det vesle høgdedraget på biletet stikk opp fordi laga står på høgkant. Den nye vegen skjer på tvers av faldingane si lengderetning. Mørke amfibolitt- og biotittlag sammen med lyse gneislag gjer faldingane synlege. (Svein Nord)
This little mountain in the picture sticks up because the layers are tilted on their sides.
This little mountain in the picture sticks up because the layers are tilted on their sides. The new road cuts right through the folds in a longitudinal direction. Dark amphibolite- and biotite layers together with lighter layers of gneiss make the layers easily visible. (Svein Nord)
Toftøyna
FOLDS: NATURE'S ART
Centimetertjukke lag falda saman i gneis. (Haakon Fossen)