. 2017 Apr 6;7:45940. doi: 10.1038/srep45940

Table 1. Results of AMS ¹⁴C analysis for the seven samples extracted from the charred wood (CW) embedded in the Campanian Ignimbrite Yellow Tuff (Fig. 1) performed after both ABA and ABOx–SC pre-treatment procedures.

Sample	Pre-treatment	¹⁴C age¹ (yrs BP²)	±1σ (yrs)	δ¹³C (‰)³	±1σ (‰)
CW1	ABA	34564	339	−25.7	1.1
CW1	ABOx	34232	306	−22.0	1.1
CW2	ABA	34168	329	−26.1	1.1
CW2	ABOx	34352	313	−23.7	1.1
CW3	ABA	34232	329	−23.7	1.1
CW3	ABOx	34362	308	−20.4	1.1
CW4	ABA	34283	330	−24.2	1.1
CW4	ABOx	34188	307	−24.3	1.1
CW5	ABA	32825	279	−25.2	1.1
CW5	ABOx	34244	306	−22.6	1.1
CW6	ABA	33751	315	−26.0	1.1
CW6	ABOx	34343	312	−23.9	1.1
CW7	ABA	34386	337	−25.6	1.1
CW7	ABOx	34183	305	−21.7	1.1
Weighted mean⁴		34290	90

¹Delta ¹³C corrected radiocarbon age⁵³ based on concentration of ¹⁴C measured in sample.

²Before Present = before 1950 AD.

³δ¹³C is a value measured on graphite and might include additional fractionation.

⁴Not including the CW5_ABA and CW6_ABA ages (in italic).

All samples 1 mg of C and C/N ratio between 190 and 285.

Table 1. Results of AMS 14C analysis for the seven samples extracted from the charred wood (CW) embedded in the Campanian Ignimbrite Yellow Tuff (Fig. 1) performed after both ABA and ABOx–SC pre-treatment procedures.