🇪🇨 Ecuador · Earthwork
Upano — Southern Sangay Hypothetical Terrace Extension
Hypothesized Sangay phase (800–1400 CE) if cultural · Hypothesized Sangay Huapula (if verified)
Contested Huapula foothill extension — 14 faint mound-like marks beyond verified Upano limit, on steep colluvium, unverified.