Ortler, Königspitze and company ... the highest elevations in South Tyrol are made of sediment stone, the same material as the 1,000 metre high main Dolomite elevation. They are the result of geological processes, which have been ongoing for millions of years.
The most common stone in the Ortler region are metomorphic stones, particularly mica slate, quarz phyllite, orthostatic gneiss, amphibolite and marble. The initial stone came from sediments such as clay and different types of sandstone, with varying degrees of feldspar and carbonate, embedded in the deep sea. Different types of lime, which came from the sediment of organisms in the shallow sea (e.g. Laas and Martell marble) formed only a small percentage. Magnatic stones such as basalt and granite (e.g. amphibolites of the Upper Rosim, Peder and Lyfi Valleys, as well as the Angelus gneis) are not so rare. The inside of the Jennwand mountain between Laas, Göflan and Martell shows extensive sediments of marble. The Laas marble consists of 96.4% to 98.6% calcium carbonate. Compared to the Carrara marble, it is 20% harder. For more than 100 years, this marble has been extracted from the Laas valley, as well as the Göflan mountain.