“…After the early Cambrian appearance of the Transcontinental Arch, which blocked transport of sand grains from eastern Laurentia, detrital zircon age populations in western North America show eastern and southern derivation from the Paleoproterozoic and Mesoproterozoic (1800-1650 and 1500-1400 Ma, respectively) YavapaiMazatzal provinces in Cambrian and Devonian time and the Paleoproterozoic (>1800 Ma) Peace River Arch in Alberta, Canada, in Ordovician time (Ketner, 1968;Smith and Gehrels, 1994;Gehrels et al, 1995;Balgord et al, 2013;May et al, 2013;Gehrels and Pecha, 2014;Yonkee et al, 2014). After the Late Devonian, 1250-950 Ma detrital zircons from the complex Grenville Orogen are present in sandstones of the thrust belt, having been recycled through the Appalachian (e.g., Gehrels et al, 2011) and/or Ellesmerian-Caledonian orogenic belts (e.g., Patchett et al, 1999Patchett et al, , 2004Beranek et al, 2010).…”