Dachstein Glacier (Ice Ages)
The Dachstein Glacier (locally also Ennsgletscher or Traun glacier ) was during the ice ages, one of the Hauptvergletscherungszonen the Eastern Alps that today's rivers Enns and Traun included.
It consisted of a glacier tongue in the Ennstal, which got stuck in the Gesäuse, but whose side tongues spilled over the Pyhrn Pass and into the Paltental , and a glacier tongue in the Traun Valley, which gave rise to the large lakes such as Hallstätter See and Traunsee .