The Argon geochronology dataset was collected by Leah E. Morgan and Alexie Millikin in the Argon Geochronology Laboratory of the USGS in Denver, Colorado in 2016. The dataset contains full raw argon isotopic data. An additional dataset includes whole rock geochemistry data collected under contract with the Central Mineral and Environmental Resources Science Center, USGS Denver. These data sets were collected on samples presented in the manuscript "40Ar/39Ar geochronology and petrogenesis of the Table Mountain Shoshonites, Golden, CO" for publication in Rocky Mountain Geology.