Question

Which of the following generally form at the upper part of a river?

• A. Meanders
• B. Oxbow lakes
• C. Gorges
• D. Floodplains

Answer 1

Answer:

C. Gorges

River Erosion and Topography

• Rivers, especially in their youthful stage, possess high erosive power due to steep gradients and fast-flowing water.

• This erosive energy is primarily directed downwards, leading to the deepening of the river channel.

• Gorges, also known as canyons, are deep, narrow valleys with very steep sides.

• They are typically formed in the upper courses of rivers, where the river flows through hard, resistant rocks.

• The process of formation involves vertical erosion (downcutting) by the river, driven by gravity and the river's momentum.