Yellow-gray stones with dark spots - the stained marl (Allgäu layers). The seabed of the Tethys Sea also had deeper basins filled with calcareous mud. Worms ate their way through the mud. The dark spots are their feeding tunnels. This is how the stones of the Allgae layers or also called stained marls were formed.

Lush alpine meadows, whole carpets of colorful alpine flowers and a magnificent sea of blossoms with an amazing variety of species - the clayey-marly stones of the Allgäu strata form very fertile soils on which these treasures of the nature park thrive.