Table 2. The calendar date ranges or periods (in calendar years) determined for selected Dates, Spans, and Boundaries in the Draper-Spang-Mantle site sequence model shown in Fig. 4 and compared with a rerun of this model but using (i) the Charcoal Plus Outlier model (30, 37) and (ii) after excluding the six minor possible outliers noted in the Supplementary Materials and fig. S5.

This rerun model runs with typical values of A_model of 86.5 and A_overall of 84 each above the satisfactory threshold value of 60. Calendar dates CE in regular font, calendar years (duration) in italics.

	Figure 4 model		Rerun revised model
	68.2% hpd	95.4% hpd	68.2% hpd	95.4% hpd
Start Draper	1523–1539	1517–1551	1522–1540	1515–1553
Date Draper	1528–1544	1523–1555	1527–1544	1521–1557
Span Draper	1–13	0–25	1–13	0–26
Mid end Draper	1532–1549	1528–1559	1531–1550	1527–1561
Duration end Draper	0–5	0–15	0–5	0–16
Mid start Spang	1543–1566	1535–1580	1543–1567	1535–1581
Duration start Spang	0–6	0–19	0–6	0–19
Date Spang	1551–1577	1543–1591	1551–1578	1542–1592
Span Spang	4–23	1–38	4–23	1–39
Mid end Spang	1564–1590	1551–1599	1564–1591	1550–1600
Duration end Spang	0–7	0–23	0–7	0–23
Mid start Mantle	1593–1608	1580–1614	1593–1608	1579–1615
Duration start Mantle	0–7	0–23	0–6	0–21
Date Mantle	1599–1614	1587–1623	1599–1614	1586–1623
Span Mantle	2–19	0–37	1–17	0–38
End Mantle	1604–1618	1599–1631	1604–1618	1596–1631