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a mountain region in the western part of the Federal Republic of Germany, part of the Rhenish Slate Mountains. The Hunsrück is situated between the valleys of the Rhine, Moselle, and Nahe rivers. It is approximately 100 km long and rises to 816 m at Mount Erbeskopf. The mountain region is composed primarily of schists and quartzites. The Hunsrück has beech and spruce forests, peat bogs, and meadows.