Tiwanaku's Legacy: A Chronological Reassessment of the Terminal Middle Horizon in the Moquegua Valley, Peru

As in other examples of state collapse, political disintegration of the Tiwanaku state circa AD 1000 was accompanied by considerable cultural continuity. In the Moquegua Valley, Peru, the location of the largest Tiwanaku communities outside the altiplano, settlements and practices associated with this postcollapse cultural continuity are termed Tumilaca. Previous research indicated that Tumilaca was short-lived, with all vestiges of Tiwanaku gone from Moquegua's archaeological record by the thirteenth century when the valley was subsequently characterized by Estuquina-style materials. This article discusses radiocarbon dates from Tumilaca la Chimba, a village established as the political authority of the Tiwanaku state waned. The 21 absolute dates from Tumilaca domestic, public, and funerary contexts span at least 350 years, from the late tenth to the mid-fourteenth centuries AD. They suggest that (1) Tiwanaku-affiliated communities endured well into the later Late Intermediate Period (AD 1200–1470); (2) ongoing debates about the emergence of Estuquina communities must consider the role of terminal Tiwanaku populations; and (3) analyses of postcollapse continuity can be enhanced by considering peripheral locales and the particularities of continuity.