The outermost part of the coastal plain is called the coastal plain itself. This refers to the area of low-lying land that runs along the coast and is typically characterized by flat or gently sloping terrain. It is the transition zone between the ocean and the inland areas, consisting of sedimentary deposits such as sand, clay, and gravel. The coastal plain is influenced by various coastal processes, including erosion, deposition, and the effects of tides and waves. It is an important ecosystem that supports diverse plant and animal life, as well as human activities such as agriculture, fishing, and tourism.