Carlson, J. A., and S. W. Marsh. “Discovery of the George Creek, Colorado Kimberlite Dikes”. International Kimberlite Conference: Extended Abstracts 4, no. 1 (September 19, 1986): 443–445. Accessed February 15, 2026. https://journals.library.ualberta.ca/ikcabstracts.com/index.php/ikc/article/view/1196.