Loope , David, and Richard Kettler. “Rinded, Iron-Oxide Concretions in Navajo Sandstone Along the Trail to Upper Calf Creek Falls, Garfield County”. Geosites 48, no. 1 (December 31, 2019): 1-7. Accessed November 21, 2024. https://giw.utahgeology.org/giw/index.php/geosites/article/view/59.