A further prerequisite for glaciers extending into the Alpine foreland are high mountains. East of the Salzach, glacier tongues hardly reached the edge of the Alps, because the mountains of the Low Tauern, unlike those of the High Tauern did not produce enough ice. So the alpentore were found mainly in the Bavarian Alpine Foreland. One of the few examples at the southern edge of the Alps was the comparatively small alpentor of today's Tagliamento valley.