Pre-Columbian geometric earthworks in the upper Purús: a complex society in western Amazonia

@article{Prssinen2009PreColumbianGE,
  title={Pre-Columbian geometric earthworks in the upper Pur{\'u}s: a complex society in western Amazonia},
  author={Martti P{\"a}rssinen and Denise Schaan and Alceu Ranzi},
  journal={Antiquity},
  year={2009},
  volume={83},
  pages={1084 - 1095}
}
It's an ill wind that blows nobody any good. The combination of land cleared of its rainforest for grazing and satellite survey have revealed a sophisticated pre-Columbian monument-building society in the upper Amazon Basin on the east side of the Andes. This hitherto unknown people constructed earthworks of precise geometric plan connected by straight orthogonal roads. Introducing us to this new civilisation, the authors show that the ‘geoglyph culture’ stretches over a region more than 250km… 
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