The Walchensee fills a tectonic valley, part of the Bayerisches Synklinorium (Bavarian Syncline) and from rocks of the Triassic period (the main dolomite, Plattenkalke, and Kössener layers). The extreme depth of the lake, 192.3 metres (631 ft), is the result of this tectonic formation. The rock faces of the northwestern shore clearly show the steep arrangement of the rock layers. The creation of the lake from the forces of mountain building indicate that Walchensee could be one of the oldest lakes in Germany. During the ice age, the Isar–Loisach glacier repeatedly left its mark on the morphology of the area and thereby the Walchensee.
Kochel am See
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