The Weatherstone lime is a Hard rock with high lime content. Around 230 million years it was formed under tropical conditions in the Tethys Sea.

Reefs began to grow in shallower parts of the sea. From these white reefs the White, light-coloured weatherstone lime, in which round cut coral pieces may have been enclosed. The Wetterstein limestone forms massive, smooth wall formations with relatively few scree slopes.

The Karwendel, the Zugspitze, the Tannheimer Berge, the Säuling peak and the more than 10 km long Heiterwand to the north-east of the Hahntennjoch are made of this rock.