Fig. 2

Overview over the field area as seen from point 3030 to the NW. Matterhorn belongs to the Dent Blanche nappe from the overriding plate (Fig. 1). Below the main Austroalpine thrust follow the upper ophiolites (Tsaté nappe: Escher et al. 1993) and various units hereafter collectively referred to as Combin Unit (Dal Piaz 1965; Bearth 1967). The top of the Zermatt-Saas ophiolite is at the major thrust fault at the foot of Hirli. The rusty-brown weathering garnet-phengite schists and eclogites in the foreground form the Theodul Glacier Unit (TGU) of this study, named after the Upper Theodul Glacier to the south (left) of the outcrops. The topographic points are also shown on the geological map (Fig. 3)