
After a multi-year effort, the National Park Service and the Utah Geological Association have published Grand Canyon National Park Centennial Paleontological Resources Inventory: A Century of Fossil Discovery and Research, available for public download on the Utah Geological Association website.
The publication documents more than 1.2 billion years of paleontological history in Grand Canyon. The rich fossil record uncovered during the inventory showcases flora and fauna from ancient Precambrian microbial mats to Pleistocene megafauna–including Shasta ground sloths, Harrington’s mountain goats, and the American cheetah–which lived in Grand Canyon’s limestone caves during the most recent Ice Age.











