A valley is a long, flat area that stretches between mountains and hills. The rolling landscape of this natural phenomenon contains rivers running through it from one end to the other. Most valleys are formed by erosion over many years because water will wear away dirt particles until they can’t hold together anymore.

Vales are the most common form of lowland on Earth, and they often have rivers running through them. These vale’s other features also depend solely upon its watercourse-rivers can create a wide variety of landscapes from steep mountains to flat plains depending on their erosive power over time.

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