Maroni(redirected from Maroni River)
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(Marowijne), a river in South America, forming the boundary between Surinam and French Guiana. Length, 680 km. It rises on the northern slopes of the Tumucumaque (Tumuc-Humac) mountain range in French Guiana. It empties into the Atlantic Ocean, forming an estuary. The river has rapids but is navigable in its lower course as far as the city of Apatou.