Amazon Basin (sedimentary basin)
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. 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.
|Bacia do Amazonas|
|Boundaries||Guiana Shield, Gurupá Arch; Marajó Basin, Brazilian Shield, Púrus Arch; Solimões Basin|
|Part of||Amazon basins|
|Area||620,000 km2 (240,000 sq mi)|
|Basin type||Continental rift basin|
- Ferreira, André; Ariely Rigueti, and Gabriel Bastos. 2015. Bacia do Amazonas - Sumário Geológico e Setores em Oferta, 1–17. ANP. Accessed 2017-09-06.