Austroalpine nappes

The Austroalpine nappes are a geological nappe stack system in the European Alps. They structurally on top of the Penninic (meaning they were thrust over them). The prefix Austro in this term refers to Austria, rather than south/southern. This is because the bulk of the Austroalpine nappes (which constitute the Eastern Alps except for some tectonic windows) is in Austria, although they also reach into Eastern Switzerland. The western boundary of the Eastern Alps is the Lake Constance - Chur – Lake Como line.

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