Input (grade 12): Crystalline basement rocks, which are exposed in the higher central regions, are the rocks forming Mont Blanc, the Matterhorn, and high peaks in the Pennine Alps and Hohe Tauern.
Output (grade 9): Even metamorphic basement rocks are found high on Mont Blanc, the Matterhorn, and other high peaks in the Pennine Alps and Hohe Tauern.