What is a delta in a coastal formation?

A delta is a landform created at the mouth of a river, where it meets a body of water, such as an ocean or lake. It is formed by the deposition of sediment carried by the river as its flow velocity decreases upon entering the standing water. Deltas typically feature a network of distributaries, marshes, and wetlands, and they support diverse ecosystems. The shape of a delta can vary, often categorized into types such as river-dominated, wave-dominated, or tide-dominated.