Geochemical and radiometric analyses. Table S1: <sup>40</sup>Ar/<sup>39</sup>Ar analytical data for Marsh Creek and Perkins Canyon intrusions; Table S2: Single-grain plateau and isochron results; Table S3: <sup>40</sup>Ar/<sup>39</sup>Ar analytical data from sample 343.<br><div><br></div>
Geochemical and radiometric analyses. Table S1: <sup>40</sup>Ar/<sup>39</sup>Ar analytical data for Marsh Creek and Perkins Canyon intrusions; Table S2: Single-grain plateau and isochron results; Table S3: <sup>40</sup>Ar/<sup>39</sup>Ar analytical data from sample 343.<br><div><br></div>