The site of Mangaasi was excavated by French archaeologist José Garanger in 1967, uncovering evidence of an old village and distinctive pottery style named 'Mangaasi'. The site complex at Mangaasi extends to the southwest and is connected to the Arapus area across the Pwanwmou Creek. Excavations revealed that the Mangaasi style pottery was sandwiched between two ash layers, while the Erueti style pottery stratigraphically overlays the Arapus ware. The boundaries of the site were defined, and it was observed that the settlement pattern followed the advancing shoreline while staying close to the stream. The latest pottery-using occupation was more dispersed across the landscape than the earlier settlement site. The cultural sequence from c. 3000 to about 1200 BP in Central Vanuatu was clarified, with Mangaasi being a transitional site.