valley-border surfaces


valley-border surfaces
   A general grouping of valley-side geomorphic surfaces of relatively large extent that occur in a stepped sequence graded to successively lower stream base levels, produced by episodic valley entrenchment; for example, multiple stream terrace levels, each with assemblages of constituent landforms (e.g., interfluves, hillslopes, fans, etc.) that dominate the margins of large river valleys.
   SW & HP

Glossary of landform and geologic terms. 2013.

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