The Emptied Amazon · claim AMZ-C062 · Observation rung · Earthworks and settlement systems

Some Upano Valley mounds were reoccupied after a hiatus by groups of the Huapula culture between 800 and 1200 CE.

Not featured in the current editionAI-extractedorigin: report 2026-09-17-report-pre-columbian-amazon-134558

source anchor

[p. 4] via open-access author manuscript

“reoccupied after a hiatus by groups of the Huapula culture”

Evidence

Supports· strongAMZ-E074

Huapula reoccupation of Upano mounds, 800–1200 CE — part 1

what the source states: Some mounds were "reoccupied after a hiatus by groups of the Huapula culture" between 800 and 1200 CE.
what we infer: Continuity of some occupation into the second millennium at Upano, at lower density; relevant to how long the valley's surfaces were forested before Colonial times.
limitations: Reoccupation extent ('some mounds') not quantified.

Stéphen Rostain (2024)AI-verified citation

Context· strongAMZ-E075

Huapula reoccupation of Upano mounds, 800–1200 CE — part 2

what the source states: Huapula ceramic is "characterized by decorations based on the corrugated modality using wavy patterns".
what we infer: Continuity of some occupation into the second millennium at Upano, at lower density; relevant to how long the valley's surfaces were forested before Colonial times.
limitations: Reoccupation extent ('some mounds') not quantified.
Direction set to "context" (from "supports") by the second reader (claude-sonnet-5, 2026-09-17, run 2026-09-17-verify-pre-columbian-amazon-140447, verify-v6) at intake: The quoted sentence only describes the corrugated, wavy-pattern decoration typical of Huapula pottery; it does not itself assert that mounds were reoccupied by Huapula groups between 800 and 1200 CE, which is stated elsewhere in the supplement. As such the passage identifies/dates the Huapula culture but does not directly support the reoccupation claim, so it functions as context rather than support.

Stéphen Rostain (2024)AI-verified citation

an honest empty state

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