U and Th blanks are <1‰ of the measured sample and are corrected for. Raw ages and delta234U values are adjusted to account for initial 230Th to give the corrected numbers in the final two columns. Errors are 2 sigma and are propagated through the age calculation. All calculations have used the half-lives measured in Cheng et al.(2000, doi:10.1016/S0009-2541(99)00157-6)