Tocantins river, 1,640 mi (2,639 km) long, formed in S central Gois state, Brazil, by the confluence of two headstreams. It flows N to the Par River, the southern distributary of the Amazon, SW of Belm. It is only partly navigable because of rapids. There are diamond washes near Carolina. The main tributary is the Araguaa.

The Columbia Electronic Encyclopedia, 6th ed. Copyright 2012, Columbia University Press. All rights reserved.

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