Data for: Assessing the preservation and provenance of Sr and Nd isotopic signatures in Cretaceous ash beds

Nd data is provided in the original PDF that was generated. Sr data is provided in Excel format. Geochemical data is provided in Excel format. U-Pb isotopic data is in Excel format, labeled as Hannon #1 8March2018 E2agecalc 187, Hannon #2, etc. All XRD files are raw data and can be readily converted if necessary.