Question

The point bars which form in the concave side of meanders of large rivers consist of:

• A. pure clayey deposits
• B. pure sandy deposits
• C. coarse sized deposits
• D. mixed size of sediments

Hint:

Point bars in meanders are depositional features formed under varying flow conditions, hence contain mixed sediment sizes.

Answer 1

The Correct Option is D

The point bars formed on the concave side of meanders in large rivers are known to consist of mixed size of sediments. This results from the natural process of sediment deposition during the flow of the river. As water moves along the bend of a meander, it loses energy, especially on the inner side, allowing various sizes of sediments to settle. The flow velocity is insufficient to carry larger particles, thus enabling a combination of sediments ranging from fine to coarse to accumulate here. This dynamic creates a heterogenous layer of sediment, leading to the term "mixed size of sediments".