🇦🇷 Argentina · Earthwork
Sierra de las Quijadas — Potrero de la Aguada Southern Enclosure (Potrero Sur)
Contested Holocene ambiguous — Holocene to Late Pre-Hispanic hypothesis or natural jointing · Contested Huarpe / Comechingón (?) or natural geofact (unvalidated)
Southern Potrero enigmatic walls — 600 m rectilinear stone line 0.6 m and circular huts 4 m under Chaco vine forest; contested Huarpe vs natural jointing.