The Amazon Basin is located south of the Guiana Shield, north of the Central Brazilian Shield, east of the Solimões Basin, and west of the Marajó Basin. It is bound to the west by the Púrus Arch and in the east by the Gurupá Arch. The basin has an elongated shape with a WSW-ENE orientation. Its long axis runs from the vicinity of Manaus to the area near the confluence of Xingu River with the Amazon River.
The Amazon basin hosts large deposits of the aluminum-rich sedimentary rockbauxite.[3] The discovery of bauxite deposits approximately 70 years ago[3] made Brazil one of the most important countries in terms of both production and possession of bauxite deposits.
References
^ abBurke, Kevin C.; Lytwyn, Jennifer (1993). "Origin of the Rift Under the Amazon Basin as a Result of Continental Collision During Pan-African Time". International Geology Review. 35 (10): 881–897. doi:10.1080/00206819309465563.