Results of the Bayesian model of occupation for Tron Bon Lei, square B.

Bayesian model produced by OxCal v.4.4. [13]. An U(0,50) mixed calibration curve with IntCal20 [15] and SHCal20 [16] curves used for charcoal samples—as recommended for the Inter-Tropical Convergence Zone [16, 17]. Marine shell samples were calibrated using the Marine20 [14] calibration curve. For our charcoal dates we applied the Charcoal Plus t-type Outlier Model with a prior outlier probability of 10% for each date, which is specifically designed to account for the inbuilt age of charcoal (i.e. old wood effect) while also allowing for some stratigraphic movement in an archaeological context [82, 83]. The General t-type Outlier Model with a prior outlier probability of 5% was used for the remaining dates, following commonly used modelling procedures for general archaeological dates [82].
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