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Created page with "== Introduction == A medial moraine is a type of moraine that forms when two glaciers meet and the debris on the edges of the adjacent valley sides join and are carried on top of the enlarged glacier. As the glacier melts or retreats, the debris is deposited and a ridge down the middle of the valley floor is created. The ridge is often clearly visible when the glacier has receded. Image:Detail-50823.jpg|thumb|center|A photograph of a glacier with a promin..."