Supplemental Material: Provenance and paleogeography of the 25–17 Ma Rainbow Gardens Formation: Evidence for tectonic activity at ca. 19 Ma and internal drainage rather than throughgoing paleorivers on the southwestern Colorado Plateau

Geosphere, August 2018, v. 14, p. 1592-1617, doi:10.1130/GES01127.1, Supplemental Information. Files S1–S2, Figures S1–S5, and Tables S1–S2. File S1 contains a detailed explanation of the methods used for detrital zircon data acquisition. File S2 contains a detailed explanation of the methods used for ⁴⁰Ar/³⁹Ar data acquisition and additional information on the sample presented in the text. Figures S1–S4 contain detailed measured sections of the Rainbow Gardens Formation from all four localities. Figure S5 contains individual probability plots for detrital zircon plots, as well as one for all Rainbow Gardens Formation samples combined. Tables S1 and S2 present raw detrital zircon data and calculations of maximum depositional ages, respectively.