“…Regionally, researchers have suggested that Laramide deformation either displayed an east-or northeast-directed time-transgressive sweep of deformation (Copeland et al, 2017;DeCelles, 2004;Heller and Liu, 2016;Perry et al, 1992;Thacker & Karlstrom, 2019) or alternatively that deformation started synchronously at ca. 75 Ma (Dickinson et al, 1988).…”