The valley glacial is the type of valley whose trace is highlighted in green.
This refers to the glacier that originates in a cirque at a valley head and flowing downward between the walls of a valley.
The valley that is glacial in origin is Valley Y that is U shaped. Although in many cases, the valley glaciers usually curve U-shaped but not V-shaped.
In conclusion, the valley glacial is the type of valley whose trace is highlighted in green.
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