TROMBETAS RIVER

Portuguese Rio Trombetas, river in northwestern Par state, northern Brazil. Formed by the Poana, Anamu, and other headstreams flowing from the southern slope of the Serra Acara on the Guyana border, the Trombetas meanders generally southward for 470 mi (760 km). It forms several lakes, including Jamari and Erepecu, before joining the Amazon River upstream from bidos. Only the lower course of the Trombetas is navigable; elsewhere falls and rapids interrupt the river flow.