In the steep terrace locations of Kalkofen in the Spitzer Graben, acidic Spitz granodiorite gneiss is united with base-rich amphibolite. The topsoil of the profile consists of slightly loamified slope debris from both rock types, light-coloured granodiorite gneiss and dark amphibolite. The material lies on native granodiorite gneiss. A crack filled with clayey soil material can be seen in the middle. The vine roots penetrate deep into the rock through these cracks.