1 jan 500 ano - 500 AD: Moundbuilders in Ohio Valley decline, westward developing

Descrição:

Western (Mississippi) civilization develops:
- advanced agriculture
- thousands of villages
- built mounds for burial and ceremonial sites
- Cahokia city may have contained 30,000
- toolmakers, hide dressers, potters,
jewelry makers , weavers, saltmakers,
copper engravers, and ceramists

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