Table 3.

U-Th data table for the University of Melbourne. Activity ratios are determined after Hellstrom (2003) and Drysdale et al. (2012). Ages are corrected for initial ²³⁰Th using Equation 1 of Hellstrom (2006), the decay constants of Cheng et al. (2013), and an initial ²³⁰Th/²³²Th activity of 1.5 ± 1.5. The initial ²³⁴U/²³⁸U ratios are calculated using corrected ages, which are reported relative to 1950.

DOI: http://dx.doi.org/10.7554/eLife.24231.008

Sample ID	U (ppm)	234U/238U	2σ	230Th/238U	2σ	232Th/238U	2σ	Age (ka BP)	2σ (ka)	234U/238Uinitial	2σ
		(activity)		(activity)				(corrected)		(activity)
RS11	1.518	1.808	0.003	0.1597	0.0009	0.0000875	0.0000004	9.946	0.063	1.831	0.004
RS19	0.501	1.884	0.011	0.3916	0.0026	0.004322	0.000010	24.53	0.43	1.947	0.011
RS21	0.361	1.968	0.011	0.4654	0.0030	0.0011342	0.0000019	28.62	0.29	2.049	0.011
RS20	0.626	1.878	0.011	0.4925	0.0032	0.0023837	0.0000040	32.12	0.38	1.961	0.011
RS6	0.276	2.023	0.004	0.7856	0.0021	0.00496	0.00010	50.82	0.43	2.181	0.004
RS13	0.076	2.006	0.004	1.1837	0.0047	0.004786	0.000058	88.46	0.67	2.291	0.005
RS15	0.381	1.934	0.004	1.1661	0.0029	0.00639	0.00012	91.37	0.65	2.209	0.005
RS14	0.665	1.626	0.003	1.0010	0.0015	0.001262	0.000014	96.24	0.36	1.822	0.003
RS8	0.257	1.831	0.004	1.1397	0.0034	0.005746	0.000060	96.29	0.69	2.091	0.004
RS17	0.517	1.637	0.009	1.0248	0.0066	0.0023963	0.0000037	98.6	1.4	1.841	0.010
RS16	0.905	1.590	0.010	0.9963	0.0067	0.0017099	0.0000037	99.1	1.4	1.780	0.011
RS18	0.104	2.001	0.011	2.0320	0.0140	0.020557	0.000041	242.9	6.6	2.987	0.027
RS22	0.324	1.228	0.007	1.3017	0.0083	0.0001201	0.0000008	478	+107/–41	–	–
RS23	0.206	1.225	0.007	1.3016	0.0093	0.007818	0.000016	502	+181/–53	–	–
RS9	0.896	1.010	0.002	1.0204	0.0018	0.000916	0.000012	–	–	–	–