Supplemental Material: The three-stage petrochemical evolution of the Steens Basalt (southeast Oregon, USA) compared to large igneous provinces and layered mafic intrusions

Geosphere, December 2018, v. 14, 2505-2532, doi:10.1130/GES01665.1, Supplemental Files. File 1: Analytical protocol and full results for Ar-Ar age dating of lower A Steens Basalt basal flow. File 2: Mineral composition data for olivine, clinopyroxene, plagioclase, and Fe-Ti oxides analyzed from the lower Steens Basalt for this study. File 3: Whole-rock major and trace element compositions, analytical precision and accuracy, and sample location details for Steens Basalt samples from this study. File 4: Bootstrapping data sets, calculations and results. File 5: Whole-rock data plots demonstrating a lack of cryptic alteration in Steens Basalt Samples.