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.
Pearl River Delta Pearl River Delta The Pearl River Delta Metropolitan Region (PRD, ) is the low-lying area surrounding the Pearl River estuary, where the Pearl River flows into the South China Sea. It is one of the most densely urbanized regions in the world, and is often considered an emerging megacity. The region's economy is referred to as Pearl River Delta Economic Zone, while the Chinese government's development plans consider it part of the Guangdong-Hong Kong-Macao Greater Bay Area. The PRD is a megalopolis, with future development into a single mega metropolitan area, yet itself is at the southern end of a