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GCSE Geography · key term
A wide, steep-sided valley with a relatively flat floor, also called a U-shaped valley, formed by glacial erosion.
Used by AQA and Edexcel
Specification 3.1.3.4 · Paper 1
A wide, steep-sided, broadly flat-bottomed valley formed by glacial erosion; also called a U-shaped valley.
Revise: Glacial Processes and Landforms of ErosionAbrasion and plucking deepen and widen it, producing a glacial trough with steep sides and a broad, relatively flat floor. Its cross-section is U-shaped. Nant Ffrancon in Wales is an example.
Specification 1.12, 1.14 · Paper 1
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A wide, deep, U-shaped valley with steep sides and a broad, relatively flat floor, formed by glacial erosion.
The result was a glacial trough with steep sides and a broad, relatively flat floor: a U-shaped cross-section rather than a V-shaped one. Nant Ffrancon in Eryri is an example.