Old Coastal Plain

region, Suriname

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July 1, 2026

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The Old Coastal Plain is a region in Suriname covering approximately 1,550 square miles (4,000 square km). It is characterized by fine clays and sands, featuring a varied topography that includes old ridges, clay flats, and swamps. This region is situated south of the New Coastal Plain, which is composed of sand and clay deposited by the Amazon River. The New Coastal Plain itself is a swampland, also formed from Amazonian sediment, and contains peat and sandy ridges parallel to the coast. The soils in the New Coastal Plain are fertile, particularly in diked and drained areas known as polders.12

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…New Coastal Plain is the Old Coastal Plain, which covers some 1,550 square miles (4,000 square km). It consists largely of fine clays and sands and contains a variety of topographies, including old ridges, clay flats, and swamps.
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…New Coastal Plain is the Old Coastal Plain, which covers some 1,550 square miles (4,000 square km). It consists largely of fine clays and sands and contains a variety of topographies, including old ridges, clay flats, and swamps.
Read More