Geography · Glacial Landforms
Why do tributary glacial valleys exhibit less downcutting compared to the main glacial valley, resulting in a hanging valley structure?
- 1Tributary valleys are subjected to exclusive tectonic uplift during glaciation
- 2The ice in tributary glaciers is completely free of debris, which eliminates abrasion
- 3Tributary glaciers move at significantly higher velocities, preventing downward erosion
- 4Tributary glaciers contain a smaller volume of ice, generating less friction and erosive force✓
Correct answer
Tributary glaciers contain a smaller volume of ice, generating less friction and erosive force
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