Table 1 Radiocarbon ages with calibrated years.

From: Dating the period when intensive anthropogenic activity began to influence the Sanjiang Plain, Northeast China

laboratory code

Sub.code

core

depth (cm)

14C yr BP

Error ( ±1σ)

cal yr BP

2σ range cal yr BP

XA7520

H-1-30

HXZ

29–30

1625

28

1521

1472–1570

XA7525

H-1-51

HXZ

50–51

3508

27

3777

3698–3856

XA7526

H-1-74

HXZ

73–74

5070

28

5825

5746–5904

XA7527

H-1-100

HXZ

99–100

8062

32

9000

8966-9034

XA7556

D-51

DFH

50–51

2582

30

2732

2700–2764

XA7557

D-99

DFH

98–99

4434

32

5009

4947–5071

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