| Pennsylvanian Wells Formation, Permian Meade Peak Member of the Phosphoria Formation and Triassic Dinwoody Formation were analyzed for U-Pb detrital zircon (DZ) age populations. The Wells Formation contains interpreted abundant Yavapai-Mazatzal grains 1,600-1,800 Ma sourced from southern provenance in the ARM (Ancestral Rocky Mountains). The Lower Ore Zone in the Meade Peak Member Phosphoria Formation contains a higher percentage of mid-Paleozoic zircons interpreted to have been sourced from the northeast through eolian processes. The Center Waste Shale and Upper Ore Zone of the Meade Peak Member have greater percentages of Grenville-age grains (900-1,200 Ma), interpreted to be derived from basement rocks of the Appalachian orogen. The Permian Meade Peak contains 3 times more mid Paleozoic grains than the Pennsylvanian Wells Formation. The overlying Triassic Dinwoody Formation contains the largest population of mid-Paleozoic 350-450 Ma grains. Key Words: Detrital Zircons, U-Pb, Pennsylvanian, Permian, Triassic, upwelling, Phosphoria, Meade Peak, eolian, Paleozoic, U-Pb, |