Fig. 6

Frequency distribution of the EMP-Th-U–Pb monazite ages. a–d Histograms of monazite ages in the Stubai samples, recalculated to percent. The weighted average isochrone ages from Fig. 4 are marked apart a 300 Ma reference line. e–g Histograms of monazite ages as reported by Rode et al. (2012) from regions in the Oetztal basement, recalculated to percent. h Histogram with summary of the monazite ages in (e–g)