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GCSE Geography · key term
A tributary valley whose floor lies above the floor of the main glacial trough.
Used by AQA and Edexcel
Specification 3.1.3.4 · Paper 1
Revise: Glacial Processes and Landforms of ErosionWhen the ice melts, the tributary valley appears to hang above the main trough: a hanging valley. A stream flowing out of it may fall over the steep drop as a waterfall. Cwm Dyli in Wales is an example.
Specification 1.12, 1.14 · Paper 1
A tributary valley whose floor lies above the main glacial trough because its smaller glacier eroded less deeply.
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After melting, the tributary valley floor was left above the main trough floor, forming a hanging valley. A stream flowing from it may fall over the valley edge as a waterfall. Cwm Dyli in Eryri is an example.