Dorsey, Rebecca J. al., et Supplemental material: Chronology of Miocene-Pliocene deposits at Split Mountain Gorge, Southern California: A record of regional tectonics and Colorado River evolution GSA Data Repository Item 2007020, Geology, Vol. 35, p. 57. File size: 6 p., about 1450 KB. Geoscience 2007-01-01
    https://gsapubs.figshare.com/articles/journal_contribution/Supplemental_material_Chronology_of_Miocene-Pliocene_deposits_at_Split_Mountain_Gorge_Southern_California_A_record_of_regional_tectonics_and_Colorado_River_evolution/12347336
10.1130/2007020