 The model displayed multiple magmatic intrusions spreading over time, which resulted in the heating up of the lower crust causing metamorphism and anatexis, and even managed to moderately heat up the top of the lower crust.The results also showed that final heating began at the same time as extension in shallower crustal levels, while in deeper parts, extension occurred later than the thermal peak of metamorphism.It was also shown that magmatic underplating during a time period of about thirty million years was strong enough to erase all tectono–metamorphic history in the Ivera Verbano Zone.