Folds in rocks of the hills of the Monts d'Arrée, near Commana in the department of Finistère in Brittany, France. These are small M-folds in the hinge zone of a larger fold. The view is about 5 centimetres across. The dark-coloured rock is schist of the Plougastel Formation, of Paleozoic age, with bands and pods of white quartzite.