Brazil Amazon River cruise

Brazil Amazon River cruise

The Amazon Basin is a major 620,000 square kilometres (240,000 sq mi) large sedimentary basin located roughly at the middle and lower course of the Amazon River, south the Guiana Shield and north of the Central Brazilian Shield. It is bound to the west by the Púrus Arch, separating the Amazon Basin from the Solimões Basin and in the east by the Gurupá Arch, separating the basin from the Marajó Basin.[1] The basin developed on a rift that originated possibly about 550 million years ago during the Cambrian. Parts of the rift were reactivated during the opening of the South Atlantic.[2]

The basin has an elongated shape with a WSW-ENE orientation. It long axis runs from the vicinity of Manaus to the area near the confluence of Xingu River with the Amazon River.

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