Sample	Lab number	U(ngg-1)	[230Th/238U]a	[234U/238U]a	[232Th/238U]	[230Th/232Th]	Age(ka)b	[234U/238U]ic
								
Pensacola Mountains								
								
16794b-2	UMF220705-608	6809	1.9650(37)	2.0841(24)	0.05317(50)	37	189.5(3.8)	2.851(19)
16794b-3	UMF220705-615	7303	1.9802(41)	2.1107(26)	0.03961(27)	50	189.5(2.8)	2.896(15)
16794b-4	UMF220705-618	7814	1.9725(56)	2.0947(33)	0.05987(59)	33	187.5(4.3)	2.858(22)
16794b-5	UMF220620-623	10578	1.9278(49)	2.0220(31)	0.07831(99)	25	190.6(5.9)	2.750(29)
								
Elephant Moraine								
								
13081-1	UMF200908-627	402	1.4846(74)	1.3480(24)	0.910(24)	1.6	No Age	
13081-B1	UMF201214-284	234	1.574(11)	1.4161(30)	2.027(68)	0.78	No Age	
13081-B2	UMF201214-290	240	1.5123(84)	1.3650(24)	2.340(46)	0.65	No Age	
13081-B3	UMF201214-341	239	1.5035(87)	1.3666(27)	2.388(74)	0.63	No Age	
								
23258-1	UMF200908-637	393	1.2578(54)	1.1715(22)	0.3703(49)	3.4	No Age	
23258-B1	UMF220124-413	454	1.2548(51)	1.1708(23)	0.2888(65)	4.3	No Age	
23258-B2	UMF220124-415	580	1.2527(44)	1.1718(22)	0.1621(53)	7.7	No Age	
23258-B3	UMF220124-420	565	1.2520(48)	1.1740(23)	0.1548(55)	8.1	> 640	> 2.1
								
39222-5	UMF200908-638	350	1.1438(54)	1.1281(19)	1.942(33)	0.59	No Age	
39222-B1	UMF201214-342	385	1.1419(54)	1.0951(22)	1.822(30)	0.63	> 630	> 2.0
39222-B2	UMF201214-347	363	1.1518(58)	1.0916(16)	0.169(28)	6.8	No Age	
39222-B3	UMF201214-418	366	1.1208(62)	1.0987(16)	1.540(43)	0.73	No Age	
39222-B4	UMF201214-420	280	1.1405(52)	1.0979(18)	0.447(33)	2.6	> 73	> 1.2
39222-B5	UMF201214-428	287	1.1276(60)	1.0975(19)	1.952(25)	0.58	No Age	
								
								
a Activity ratios determined after Hellstrom (2003) and Drysdale et al (2012)								
b Age in kyr before present corrected for intial 230Th using eqn. 1 of Hellstrom (2006), the decay constants of Cheng et al								
"      (2013) and [230Th/232Th]i of 4.8 ± 1.6 (Pensacola) or 4.1 ± 2.05 (Elephant).  ""No Age"" indicates either loss of U since "								
      deposition or that the Th-corrected age uncertainty encompasses all finite ages								
c Initial [234U/238U] calculated using corrected age								
2-s uncertainties in brackets are of the last two significant figures presented 								
								
								
								
								
								
								
Cheng, H., Lawrence Edwards, R., Shen, C.-C., Polyak, V.J., Asmerom, Y., Woodhead, J.D., Hellstrom, J., Wang, Y., Kong, X., 								
	Spötl, C., Wang, X., Calvin Alexander, E., Jr, 2013. Improvements in 230Th dating, 230Th and 234U half-life 							
	values, and U–Th isotopic measurements by multi-collector inductively coupled plasma mass spectrometry. 							
	Earth and Planetary Science Letters 371–372, 82–91.							
								
Drysdale, R.N., Paul, B.T., Hellstrom, J., Couchoud, I., Greig, A., Bajo, P., Zanchetta, G., Isola, I., Spötl, C., Baneschi, I.,								
	 Regattieri, E., Woodhead, J.D., 2012. Precise microsampling of poorly laminated speleothems for U-series 							
	dating. Quaternary Geochronology 14, 38–47. 							
								
Hellstrom, J., 2003. Rapid and accurate U/Th dating using parallel ion-counting multi-collector ICP-MS. Journal of Analytical 								
	Atomic Spectrometry 18, 1346–1351. 							
								
Hellstrom, J., 2006. U–Th dating of speleothems with high initial 230Th using stratigraphical constraint. Quaternary 								
	Geochronology 1, 289–295.