What is Amazon basin?
[[Image:Amazonriverbasin basemap.png|thumb|300px|Amazon River basin]] The '''Amazon [[Basin (geology)|Basin]]''' is the part of [[South America]] drained by the [[Amazon River]] and its branches. It is low-lying in relation to [[sea level]]. The river has its origins high up in the [[Andes]] of [[Peru]] and [[Ecuador]]. More than half of this [[drainage basin]] (54%) is in [[Brazil]], including the lower part. Other portions are [[tributary|tributaries]] from [[Colombia]], [[Venezuela]] and [[Bolivia]]. The [[Amazon rainforest]] is the largest in the world, covering about {{Convert|8,235,430|km2|sqmi|abbr=on}} with dense tropical [[rain forest]]. It is also known as Amazonia. This is one of the world's most important [[ecosystem]]s. {{Brazil topics}} {{geo-stub}} [[Category:Regions of South America]] [[Category:Drainage basins]]