How do piedmont glaciers form at the foot of mountain ranges?

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glacier Perito Moreno Glacier, Los Glaciares National Park, Argentina.

Piedmont glaciers are formed when the ends of multiple valley glaciers converge at the base of a mountain range. As these glaciers emerge from their confined mountain valleys and reach the flatter terrain at the foot of the mountains, they are no longer restricted by valley walls, allowing them to spread out and coalesce into a broader ice mass.12