River delta The Okavango Delta in Botswana is one example. The generic term "mega delta" can be used to describe very large Asian river deltas, such as the Yangtze, Pearl, Red, Mekong, Irrawaddy, Ganges-Brahmaputra, and Indus. The formation of a delta is complicated, multiple, and cross-cutting over time, but in a simple delta three main types of bedding may be distinguished: the bottomset beds, foreset/frontset beds, and topset beds. This three part structure may be seen in small scale by crossbedding. The Ganges/Brahmaputra combination delta, which spans most of Bangladesh and empties into the Bay of Bengal, is the world's largest delta.
Mahanadi River Delta Mahanadi River Delta Mahanadi River Delta in India is a basin of deposit that drains a large land mass of the Indian subcontinent into the Bay of Bengal. The alluvial valley is wide and relatively flat with a meandering river channel that changes its course. The Mahanadi River flows slowly for and has an estimated drainage area of . It deposits more silt than almost any other river in the Indian subcontinent. The area of the drainage basin is 141,464 km. The interior coastal plain has a relatively low elevation. The average elevation of the drainage basin is 426 m,