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stream valley

geology

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fluviokarst landscape

In cave: Fluviokarst
…of surface stream channels and stream valleys is still in evidence, though much of the drainage may be underground. Tributary surface streams may sink underground, and there may be streambeds that carry water only during seasons of high flow or during extreme floods. In addition, the floors of the valleys…
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glacial valley

In glacial valley
The commonly V-shaped stream valley is converted to a U-shaped valley because the U-shape provides the least frictional resistance to the moving glacier. Because a glacier has a much greater viscosity and cross section than a river, its course has fewer and broader bends, and thus, the valley…
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