Table 1.

AMS radiocarbon dates of the individual charcoal particles from the charcoal-rich top layer of the Usselo horizon at Geldrop-Aalsterhut (individually calibrated to calendar years)

Sample nameDepth, cmSample nr. for AMS14C age B.P.Cal. age B.P.
AH-21a−5.0–−4.0GrA-4957010,735 ± 4512,675–12,585
AH-21b−5.0–−4.0GrA-4952110,765 ± 5012,700–12,595
AH-12a0.0–2.0GrA-4951610,765 ± 5012,700–12,595
AH-12b0.0–2.0GrA-4950710,920 ± 5012,870–12,695
AH-32a0.0–2.0GrA-4952710,960 ± 6012,915–12,715
AH-32b0.0–2.0GrA-4952910,755 ± 5512,695–12,590
AH-23a0.0–2.0GrA-4957310,860 ± 4512,795–12,640
AH-23b0.0–2.0GrA-4957410,845 ± 4512,775–12,630
AH-13a2.0–4.0GrA-4956910,895 ± 4512,840–12,670
AH-13b2.0–4.0GrA-4951410,880 ± 11012,880–12,640
AH-33a2.0–4.5GrA-4957510,900 ± 5012,850–12,675
AH-14a4.0–5.5GrA-4951511,020 ± 7513,065–12,775
AH-14b4.0–5.5GrA-4950910,865 ± 5512,810–12,640
AH-14c4.0–5.5GrA-4952410,840 ± 7512,795–12,615

The larger measurement errors are caused by the fact that the samples were very small, even for AMS. Samples were taken from different depth Usselo at three different locations (see Fig. S1). The depth of the samples is indicated using the top of the Usselo horizon as a reference level (0 cm). See Fig. S2 for a visual overview of the modeled and individually calibrated dates.