The Western Alps at Mont Blanc and Monte Rosa, the Southern Alps at Braveno, Brixen, Cima d'Asta, Doss del Sabion and the Barbagia and Gallura granites in Sardinia are all examples of Carboniferous and Permian granite pluton and batholith intrusions. Ignimbrite eruptions had an important role at the same time in forming parts of the central Southern Alps. Sedimentary rocks from before the Permian have remained intact and unmetamorphosed (or only having experienced low-grade metamorphism) in the Paleocarnian charn of the eastern Southern Alps. The metamorphic grade increases to the west, reaching amphibolite grade in the Orobic Alps and granulite grade in the Ivrea-Verbano Zone. Most of the basement rocks in the Dolomites are phyllite or gneiss at greenschist grade. Within the Dioritic-Kinzigitic unit, biotite and sillimanite-rich gneiss outcrop in Calabria.