“…The discernible Phanerozoic history of the study area began with formation of a rifted passive margin along western Laurentia during Neoproterozoic-Cambrian time (Bond et al, 1984;Colpron et al, 2002;Lund, 2008;Stewart, 1972); this passive margin endured until the Devonian (Lund, 2008;Pyle & Barnes, 2003). The Precambrian basement east of the WISZ consists of an assemblage of Proterozoic and Archean terranes (Foster et al, 2006;Gaschnig et al, 2013;Hoffman, 1988;Karlstron et al, 2002;Mueller et al, 2011;Ross, 1991;Sims et al, 2005), including the Selway and Grouse Creek basement blocks and the western part of the Wyoming craton (Figure 1, e.g., Foster et al, 2006;Mueller et al, 2011;Sims et al, 2005). (Gaschnig et al, 2011) divides Blue Mountains Province to the west from Precambrian North America to the east (modified from Davenport et al, 2017, Figure 1 Paleoproterozoic basement of the Selway terrane, comprising predominantly 1.6-to 2.4-Ga-age metamorphic and igneous rocks (Foster et al, 2006) with some remnant Precambrian sedimentary cover of the Belt (Lemhi; 1470-1380 Ma) and Windermere (<850-600 Ma) Supergoups, underlies the northeastern part of the study area ( Figure 1).…”