What are the landmarks of coastal plains?

Coastal plains are landforms found along the edges of continents, formed by the deposition of sediments from rivers and glaciers. They are characterized by low relief, and can be divided into two main types: Atlantic coastal plains and Gulf coastal plains.

Landmarks of Atlantic coastal plains:

* Barrier islands: These are long, narrow islands that lie parallel to the shoreline. They are formed by the deposition of sand and gravel by waves and currents.

* Estuaries: These are partially enclosed bodies of water where a river meets the ocean. They are formed by the drowning of river valleys by rising sea levels.

* Fjords: These are long, narrow inlets of the sea that are surrounded by steep cliffs. They are formed by glacial erosion.

* Salt marshes: These are wetlands that are dominated by salt-tolerant plants. They are found in areas where the land is flooded by saltwater regularly.

Landmarks of Gulf coastal plains:

* Barrier islands: These are long, narrow islands that lie parallel to the shoreline. They are formed by the deposition of sand and gravel by waves and currents.

* Chenier plains: These are coastal plains that are characterized by ridges of sand and shell that are deposited by waves and currents.

* Lagoons: These are shallow bodies of water that are separated from the ocean by barrier islands. They are often found behind barrier islands.

* Mangroves: These are tropical trees and shrubs that grow in saline water. They are found in areas where the land is flooded by saltwater regularly.