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That that entire landscape is a foremost example of an inherently destructive process. Alpine glaciers have a tendency to dig downwards on their accumulation slope. This is due to their bowl shaped cirques’ tendency to gain snow mass above the frostline, after which they shove older ice downslope from the weight of new firn above. The result is the transition of gently rounded mountains into the jagged peaks of bedrock on display here. Further downstream you’ll see the transition of narrow river valleys with self-entrenching meanders expand into broadly rounded valleys.
Of course, all that happened when human technology was only a little more advanced than scratching his ass with a stick.