Pennine basement, Tauern Window  Mountain scenery entirely composed of granitic gneisses in the core of the Pennine (European) basement in the Tauern Window Pennine basement, Tauern Window  Clean outcrop of granitic gneiss (precursors were Permian intrusions) in the niche that shelters St Barbara at the summit of the high pass seen in the previous photo. Pennine basement, Tauern Window  The Hochalmspitz, forming the core of the basement granite gneiss dome at the eastern end of theTauern Window. The ridge in the foreground shows the contact between the dark pre-Alpine metamorphic rocks (above) and the pale granitic gneisses (below). Pennine basement, Tauern Window  View down at the same location as the previous photo. This deep section into basement granites provided samples that constrained the heat production for post-collisional metamorphism. Near the top of the ridge opposite, the pale gneiss / dark metasediment contact is seen. Pennine zone, Tauern eclogite unit  Central Tauern Window, looking south. Camera position is on Pennine basement; the mountain hut stands on the basement's thin autochthonous metasedimentary cover. The opposite cliff contains the 1000m thick eclogite zone, thrust northwards over the basement.
Pennine zone, Tauern Window  Most of the metasedimentary cover in the Tauern window is not the original cover of the basement, but deep-water rocks of the Alpine Tethys ocean. This peak is the Grossglockner, made principally of metabasalts of oceanic affinity. Pennine zone, Tauern Window  Dark metabasalt and pale calc-schist alternate above the Pasterzen glacier Pennine zone, Tauern Window  Cliffs of greenschist facies calc-schist near the southern edge of the Tauern Window. Pennine zone, Tauern Window  Mike Bickle samples dark chloritoid schist from the deep-water metasediments in the Tauern Window in September 1972. The mountain range behind him forms the southern margin of the window, with schists and gneisses of the Austroalpine basement (Adriatic plate) dipping away to the south. Austroalpine basement  Metamorphic rocks of the Austroalpine basement south of the Tauern Window. In this area the deeper levels have experienced an amphibolite-facies Cretaceous (i.e. pre-collision) metamorphic event, and the post-collision metamorphism caused only patchy retrograde effects.
Austroalpine basement  Metamorphic rocks of the Austroalpine basement in outcrop, showing pre-collision fold structures. Austroalpine basement  Complex folding history in the Austroalpine units: these medium-scale crenulations refold the tight folds seen in the previous photograph. Austroalpine cover (Northern Alps)  The Austroalpine sedimentary cover units include thick Triassic shelf carbonate successions, here making up the Dachstein massif in the Northern Calcareous Alps. Southern Alps, Mesozoic cover  The Sella Dolomites, in the Southern Alps, are the equivalent of the allochthonous Austroalpine shelf carbonates of the Northern Calcareous Alps Pennine zone metabasite  Epidote-banded greenstone - metabasaltic rock from the Tauern window, containing albite, chlorite, epidote, minor actionolite, titanite and opaque oxide. Width of view ~7 mm
Pennine zone metabasite  Porphyroblastic greenschist, with chlorite, epidote, and very fine needles of actinolite enclosed in the albite porphyroblasts. width 1 cm Pennine zone metapelite  Garnet-chlorite schist from the metasedimentary Pennine cover sequence. Width of view 1.5 cm. Pennine zone metapelite  GD310, Staurolite-chloritoid-chlorite schist, eastern Tauern Window, at the greenschist-amphibolite facies boundary. Field of view 1 mm. Pennine zone metapelite  Graphitic kyanite-garnet schist from the highest-grade part of the oceanic Pennine cover units in the central Tauern window.  Field of view 2 mm.