Looking towards the Les Pyramides Calcaires below Mont Blanc and Mont Blanc du Courmayeur.

tour du mont blanc italy alps italian alps mountain mountain range weather rocks slope steep geology ridge erosion glacier glacial retreat climate change global warming mont blanc mont blanc du courmayeur pinnacle pinnacled serrated snow white summit aiguille de tre la tete glaciation shrinking exposed glacier du brouillard brouillard glacier glacier du freney freney glacier waterfall meltwater france french alps les pyramides calcaires calcaires pyramid