Chidsey , Thomas, and Hellmut Doelling. “Green River Overlook, Island in the Sky District, Canyonlands National Park, Southeastern Utah”. Geosites 48, no. 1 (June 13, 2020): 1-12. Accessed April 19, 2024. https://giw.utahgeology.org/giw/index.php/geosites/article/view/76.