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. 2021 Jan 13;7(3):eabd4648. doi: 10.1126/sciadv.abd4648

Table 1. U-series dating results.

U-series dating results for Leang Tedongnge (LTed3) and Leang Balangajia 1 (LBLGJ1 and LBLGJ2). U-Th isotope ratios are activity ratios. ppm, parts per million.

Sample Description Sample
weight
(mg) 		238U
(ppm) 		230Th/232Th 230Th/238U 234U/238U Uncorrected
age (ka) 		±2σ
(ka) 		Corrected
age (ka) 		±2σ
(ka) 		Corrected
initial
234U/238U
LTed3.4 Sequence of
aliquots		 1.6 13.3 355 0.1841 ± 0.0010 0.5665 ± 0.0011 45.53 0.36 45.44 0.36 0.5070 ± 0.0016
LTed3.3 Sequence of
aliquots		 1.5 2.1 57 0.1878 ± 0.0025 0.5645 ± 0.0018 46.99 0.86 46.40 0.94 0.5022 ± 0.0028
LTed3.2 Overlies animal
figure		 1.5 2.1 37 0.1836 ± 0.0029 0.5717 ± 0.0018 44.74 0.96 43.88 1.10 0.5133 ± 0.0030
LTed3.1 Underlies
animal figure		 1.1 1.4 137 0.9229 ± 0.0075 0.9247 ± 0.0027 SE
LBLGJ1.1 Sequence of
aliquots		 5.6 2.37 354 0.2848 ± 0.0015 0.982 ± 0.0011 37.39 0.24 37.32 0.24 0.9800 ± 0.0013
LBLGJ1.2 Sequence of
aliquots		 5.6 3.03 587 0.2348 ± 0.0008 0.9819 ± 0.0005 29.83 0.11 29.79 0.11 0.9803 ± 0.0006
LBLGJ1.3 Overlies animal
figure		 5.7 2.17 613 0.2318 ± 0.0010 0.9791 ± 0.0011 29.49 0.15 29.45 0.15 0.9773 ± 0.0012
LBLGJ1.4 Underlies
animal figure		 5.7 1.71 301 0.5173 ± 0.0018 0.9787 ± 0.0012 82.29 0.45 82.13 0.46 0.9731 ± 0.0016
LBLGJ2.1 Sequence of
aliquots		 6.0 2.44 460 0.2376 ± 0.0010 0.9733 ± 0.0011 30.56 0.16 30.51 0.16 0.9709 ± 0.0012
LBLGJ2.2 Sequence of
aliquots		 5.6 1.81 355 0.2373 ± 0.0011 0.9710 ± 0.0012 30.60 0.17 30.54 0.17 0.9684 ± 0.0013
LBLGJ2.3 Sequence of
aliquots		 5.2 1.66 476 0.2262 ± 0.0015 0.9697 ± 0.0014 29.01 0.22 28.96 0.22 0.9671 ± 0.0016
LBLGJ2.4 Overlies hand
stencil		 5.3 1.63 360 0.2497 ± 0.0015 0.9736 ± 0.0010 32.36 0.23 32.29 0.24 0.9711 ± 0.0011
LBLGJ2.5 Underlies hand
stencil		 1.0 1.52 173 0.4743 ± 0.0033 0.9756 ± 0.0030 72.87 0.81 72.61 0.82 0.97 ± 0.0038