Fig. 5

Horizontal depth section at ca. 150 km depth (data from 135–165 km) through the 3-D Vp model of Lippitsch et al. (2003, their Fig. 13) superimposed with the outlines of the Tauern Window (see Fig. 1) and the trace of the Periadriatic Fault, offset by the Giudicarie Line (red stippled line). The depth section illustrates the variations in Vp within the upper mantle relative to the chosen 1D initial model. The positive velocity anomalies of >4 % Vp (dark blue) are interpreted as a SE-dipping European lithosphere in the Western Alps and a NE-dipping Adriatic lithosphere in the Eastern Alps (see Lippitsch et al. 2003 and Kissling et al. 2006 for further details). Note that the transition zone between the two high-velocity anomalies is located beneath the Giudicarie Line and the western part of the Tauern Window