Hanging Valley | Geological Feature | Britannica

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glacial valley

• In glacial valley

  …tributary troughs are left as hanging valleys high on the walls of the main glacial valley. Postglacial streams may form waterfalls from the mouths of the hanging valleys, a well-known example being Yosemite Falls, California.

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landform evolution

• In glacial landform: Hanging valleys

  Large valley glacier systems consist of numerous cirques and smaller valley glaciers that feed ice into a large trunk glacier. Because of its greater ice discharge, the trunk glacier has greater erosive capability in its middle and lower reaches than smaller tributary glaciers…

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structure

• In river: Falls attributable to discordance of river profile

  …waterfalls are most common where hanging valleys occur. Such valleys generally form when glacier ice deeply erodes a main or trunk valley, leaving tributary valleys literally hanging far above the main valley floor. After the glaciers have melted and withdrawn, streams from such tributary valleys must fall in order to…

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