In the study of fluvial geomorphology, which of the following erosional landforms is formed by the vertical downward cutting of a river where the bed level lies far below the original plateau surface due to rapid tectonic uplift?

💡 Solution & Explanation

An incised meander, also known as an entrenched meander, develops when a river flowing over a gently undulating landscape experiences rapid regional tectonic uplift of the land surface. This sudden increase in gravitational potential energy causes the river to renew its downcutting activity while preserving the meander loop geometry, carving deep steep-sided canyons into the bedrock. Alluvial fans are depositional features at mountain fronts, while oxbow lakes form through lateral erosion and cutoff processes in mature lowland floodplains. Tectonic rejuvenation alters longitudinal river profiles significantly.