Jensen , M., B. Kowallis, E. Christiansen, C. Webb, M. Dorais, D. Sprinkel, and B. Jicha. “Fallout Tuffs in the Eocene Duchesne River Formation, Northeastern Utah—ages, Compositions, and Likely Source”. Geology of the Intermountain West, Vol. 7, Mar. 2020, pp. 1-27, doi:10.31711/giw.v7.pp1-27.