Early Holocene charcoal accumulations in the Aktun Ha cenote: Evidence of fire used by the first settlers of the Yucatán Peninsula, Mexico

An integrative methodology, including controlled heating experiments, petrography, taphonomy, systematics of charcoal fragments, solid‐state 13 C nuclear magnetic resonance (NMR) spectroscopy, differential scanning calorimetry (DSC), and 14 C dating, are used to discriminate in situ (anthropogenic) versus transported charcoal accumulations in the Ancestors Chamber at the Aktun Ha cenote and its potential relationship with the initial settlement...