Arthur Chadwick and Elaine Kennedy presented their research at the Third Biennial Conference on Colorado Plateau Research in Flagstaff, Arizona, October 16-19. Dr. Chadwick presented evidence that the Tapeats Sandstone was rapidly deposited in a deep marine environment. A formal paper has been submitted to the Proceedings of that meeting. Drs Chadwick and Kennedy standing on Tapeats Sandstone in the Grand Canyon, Arizona. Photo courtesy of Ann Brennan.
Research continues on the shell material.
At present at least eleven different kinds of shell material have been identified. Professor Carlos Steger standing on sandstone outcrop containing dinosaur eggs. Photo courtesy of Elaine Kennedy. Dr. Jim Gibson taught a graduate course on biogeography for Loma Linda University's Natural Sciences Department. The class studied the distributions of vertebrates and flowering plants.