If two glaciers with rock debris on their sides join,then the debris on their sides will join and form medial moraine deposits when the glacier retreats.

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When two glaciers with rock debris on their sides join, the debris on their sides will combine and form a medial moraine deposit if both glaciers merge and continue moving in the same direction. When the glacier retreats, the deposited rock debris will remain as a medial moraine ridge in the center of the glacier's former path.

If Two Glaciers with Rock Debris on Their Sides Join,then