The Trisselwall on Lake Altaussee.

In the foreground on the left is the „bellied stone wall“ at the foot of the Loser mountain, which is reflected in the lake Altaussee.

The Trissel wall, which rises steeply around 1,000 meters above the lake in the east of Lake Altaussee, fills the picture.

The Trissel Wall belongs to the Dead Mountains and is made up of layers of Oberalmer, Tressen lime and Plassen lime.

Oberalmer layers are banked, pebbly limestones that underlie the striking walls of the Trissel Wall. They were deposited in deeper ocean areas.

The slow subsidence of the Tethys seabed led to the formation of reefs. The Tressen stone lime is a reef rubble limestone and comes from the flank area of ​​the Plassen lime lagoon.

The up to 700 m thick Plassen lime was deposited in a shallow tropical sea about 155-140 million years ago. Reef fossils such as corals and sponges are characteristic.

The Plassen lime is a chemically pure limestone. It has a high degree of whiteness.