@the_az_explorer: Fun fact: the "newest" layer of rock in the Grand Canyon is the Kaibab formation which existed before the dinosaurs! #GrandCanyon #grandcanyonnationalpark #geology #geologyfacts #arizonacheck #hikeaz #arizonahiking #fossil #fossils #fossiltok #Hiking #hiketok #hikersoftiktok #arizonalife #optoutside #ExploreMore #letsgo #adventuretime #getoutside #adventureculture #hiker #themoreyouknow