Which term describes a steep, narrow valley with steep sides, formed by the down-cutting of a river through a high plateau, often deeper than it is wide?

💡 Solution & Explanation

A canyon is a deep, narrow valley with precipitous sides carved by continuous river erosion through high plateau terrains over extended geological periods. Estuaries and deltas represent depositional or transitional coastal landforms rather than inland erosional gorges. Geomorphological landform classifications form an integral segment of physical geography.