Amazon River地形图
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Amazon River
During what many archaeologists called the formative stage, Amazonian societies were deeply involved in the emergence of South America's highland agrarian systems. The trade with Andean civilizations in the terrains of the headwaters in the Andes formed an essential contribution to the social and religious development of higher-altitude civilizations like the Muisca and Incas. Early human settlements were typically based on low-lying hills or mounds.
关于这张地图
名称：Amazon River地形图、海拔、地势。
平均海拔：4 米
最低海拔：-4 米
最高海拔：24 米
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