Table 1.

Calibrated radiocarbon dates obtained from materials recovered from the refuse pits.

N°SacA	Sample	Type of sample	mg C	Delta C13	pMC	Err pMC	Age BP	CalBC 2 sigma
64848	NAC B 85 (profile 2, at − 47 cm)	Charcoal	0.40	− 29.20	75.04151	0.28532	2305 ± 30	401–204
64849	NAC B 85 (profile 1, at − 40 cm)	Charcoal	1.11	− 26.00	75.43522	0.22148	2265 ± 30	391–197
64850	NAC B 82 (inside ceramic vessel 0–60 cm)	Charcoal	0.48	− 24.90	98.19873	0.25194	145 ± 30	1674–1950
64851	NAC B 83 (inside ceramic vessel 0–110 cm)	Charcoal	1.37	− 22.80	98.00359	0.24741	160 ± 30	1671–1950
60740	NAC C 19 F1 (120–150 cm)	Canarium kernel	1.66	− 23.10	73.54603	0.21742	2470 ± 30	755–411
60741	NAC C 19 F2 (120–150 cm)	Canarium kernel	1.35	− 24.20	73.48592	0.21856	2475 ± 30	756–413
60742	NAC C 19 F3 (120–150 cm)	Canarium kernel	1.08	− 24.80	72.91564	0.23806	2535 ± 30	791–521

Calibrations were obtained using the radiocarbon calibration program CALIB REV8.2¹⁶). Due to the regional climate, controlled by the seasonal variability of the intertropical convergence zone (ITCZ), a mixed Southern Hemisphere and Northern Hemisphere atmosphere curve selection was used^17,18.