Irrefutable evidence of past glaciations in the Peneda Mountain: The upper section of the Vez river valley encloses some of the most important vestiges of the glaciation that occurred in Portugal during the last million years (Wurm Glaciation). Here the valley has a “U”- shaped cross profile, polished rocks, and accumulations of glacial sediments. Among these glacial vestiges the erratic boulders occurring on the slopes of the right bank of river Vez near Branda da Aveleira and Branda de Santo António are of particular scientific value. Granite blocks of different sizes, some of them several metres in diameter, occur on schist bedrock on the upper section of the slopes, which constitutes evidence of glacial transport and the justification for their name (“erratic boulders”).
Location: Melgaço
