The Müsella Slice is composed of the Müsella basement and an overlying band of strongly tectonized Mesozoic sediments (“Corn element”). This slice is considered part of the Bernina Nappe Complex mainly for structural reasons. Thereby the Müsella basement is correlated with the basement of the Julier Nappe while the Mesozoic sediments are correlated with the Ela Nappe on the north-western side of the Engadine Fault. The Mesozoic sediments of the Müsella Slice are overthrust by the Upper Austroalpine Languard Nappe. Alternatively, this slice could be considered as part of the Upper Austroalpine Languard Nappe.