In the south the Bóndhólsskarð Group adjoins the Ketilfjall Group. For lack of time I passed on closer examination and took only a picture from the distance. It shows thermally altered, whitish soil of Bóndhólsskarð Group in the background and parts of the Hillside Group (see below) in foreground.
View from Mt. Bæjarfjall in northward direction towards Bóndhólsskarð Group and Ketilfjall ridge (on the right side):