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1. 8000 BCE: Earliest known formation of sambaquis begins along the coast of South America, as indigenous communities start to accumulate shells, bones, and artifacts.

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8000 BCE: Earliest known formation of sambaquis begins along the coast of South America, as indigenous communities start to accumulate shells, bones, and artifacts.

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2. 5000 BCE: Sambaquis become more prominent as coastal communities grow and continue to add to these shell mounds.

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5000 BCE: Sambaquis become more prominent as coastal communities grow and continue to add to these shell mounds.

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3. 3000 BCE: Some sambaquis reach significant sizes, serving as burial sites and markers of cultural practices.

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3000 BCE: Some sambaquis reach significant sizes, serving as burial sites and markers of cultural practices

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4. 2000 BCE: Continued use of sambaquis for domestic waste disposal, burial, and possibly ceremonial purposes.

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2000 BCE: Continued use of sambaquis for domestic waste disposal, burial, and possibly ceremonial purposes

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5. 1000 BCE: Peak usage of sambaquis by prehistoric human groups in Brazil.

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1000 BCE: Peak usage of sambaquis by prehistoric human groups in Brazil.

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6. 500 BCE: Gradual decline in the construction and use of sambaquis as cultural practices evolve.

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500 BCE: Gradual decline in the construction and use of sambaquis as cultural practices evolve.

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7. 1500 CE: European explorers begin documenting coastal features, though they may not initially recognize the cultural significance of sambaquis.

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1500 CE: European explorers begin documenting coastal features, though they may not initially recognize the cultural significance of sambaquis.

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8. The term "sambaqui" is first used in scientific literature to describe these shell mounds.

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create an image of acient idigenous people writing

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9. Danish naturalist Peter Wilhelm Lund studies and excavates some of the first sambaquis, bringing attention to these archaeological sites.

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Danish naturalist Peter Wilhelm Lund studies and excavates some of the first sambaquis, bringing attention to these archaeological sites.

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10. The sambaqui at Itaipu in Niterói, Brazil, is excavated, revealing human remains and artifacts.

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The sambaqui at Itaipu in Niterói, Brazil, is excavated, revealing human remains and artifacts.

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11. Radiocarbon dating techniques are applied to organic materials found in sambaquis, providing more accurate dating for the layers and artifacts.

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Radiocarbon dating techniques are applied to organic materials found in sambaquis, providing more accurate dating for the layers and artifacts.