This is the pre-peer reviewed version of the following article: Schwartz, T.M., Fosdick, J.C., and Graham, S.A. (2016). Using detrital zircon U-Pb ages to calculate Late Cretaceous sedimentation rates in the Magallanes-Austral basin, Patagonia. Basin Research 29(6): 725-746. Doi:10.111/bre.12198, which has been published in final form at https://doi.org/10.111/bre.12198. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving.