Smith, Jon J., Brian F. Platt, Greg A. Ludvigson, Robert S. Sawin, Craig P. Marshall, and Alison Olcott-Marshall. “Enigmatic Red Beds Exposed at Point of Rocks, Cimarron National Grassland, Morton County, Kansas: Chronostratigraphic Constraints from Uranium-Lead Dating of Detrital Zircons”. Current Research in Earth Sciences, no. 261 (November 9, 2015): 1–16. Accessed April 24, 2025. https://journals.ku.edu/cres/article/view/11842.