We present new data on a class of ceramics called Tiltepec yellow wares, dated to the Late and Terminal Formative period occupations at Cerro Jazmín, Oaxaca (300 BC-AD 300). Evidence from 27 radiocarbon-dated ceramic assemblages indicates that Tiltepec yellow wares are a distinct ceramic type. Instrumental Neutron Activation Analysis (INAA) results further confirm the wares' identification. Defining Tiltepec yellow wares as a type apart from Classic-period orange ceramics allows the reassessment of the regional settlement sequence, previously understood to indicate widespread settlement abandonment in the Terminal Formative period. The new data suggest that Cerro Jazmín had a more continuous urban occupation than previously thought.
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