Presentamos una estrategia metodológica para la ubicación temporal de estilos alfareros que combina el análisis contextual y el tratamiento estadístico del conjunto de datos radiocarbónicos disponible. El análisis abordó tres grupos de alfarerías con una amplia expresión regional e importantes afinidades estilísticas: San José, Hualfín y Molinos, representativos de los inicios del período Intermedio Tardío en la región valliserrana del Noroeste argentino. Se trabajó con una muestra exhaustiva de 28 fechados, evaluando diferentes grados de certeza en la asociación muestra-evento, y discriminando la asociación entre los eventos datados y los conjuntos cerámicos. Este tratamiento de los fechados permitió jerarquizar aquellos más confiables y seleccionar una submuestra cualitativamente superior. Los datos depurados se emplearon para evaluar la hipótesis sobre la cronología tardía de los estilos mediante modelación estadística bayesiana. Como resultado se pudieron detectar datos anómalos y ubicar el lapso aproximado de la producción de los conjuntos estilísticos entre los siglos once y catorce dC, momentos que se asocian a desarrollos locales preincaicos. Asimismo, se establecieron tendencias diferenciales entre los tres grupos estilísticos considerados, observando antigüedades mayores para Hualfín y Molinos.

New radiocarbon dates and excavations show that Buen Suceso (OSE-M-2M-4) in Santa Elena, Ecuador, was occupied between 3700 and 1425 BC. These dates demonstrate that Buen Suceso is a rare multicomponent Valdivia site and one of the longer-occupied Valdivia sites investigated to date.

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 Estuquiña-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 Estuquiña 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.

Seven AMS radiocarbon dates (1950–1525 cal BC) from controlled contexts demonstrate Early Formative period occupation in coastal Oaxaca, Mexico. These dated elements from the site of La Consentida include hearths, occupational surfaces, carbon adhering to pottery from a midden, and human bone collagen processed with XAD purification. They were excavated from primary contexts and do not represent redeposited materials. An eighth sample, dated to the Middle Formative period, is considered postoccupational. The diversity of dated deposits and features, their distribution, and their overlapping calibrated ranges indicate settlement by an initial Early Formative period village.