In the south-west they disappear below recent sediments of the Po basin that are lying discordant on top of them.
Neither are high grade metamorphic rocks common in the region.
The Southern Alps are tectonically characterized by large scale thrusting and folding to the south, the dominant vergence (direction of fold asymmetry) in the region is southward.
To the west, south of the Valle d'Aosta, the Southern Alps form a huge monocline, up until the point that mantle material of the Apulian plate crops out in what is called the Ivrea zone.
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