Geologic Formations: Grand Canyon Geologic Formations National Park Service John Newberry Geologic Formations: Grand Canyon National Park Service National Park Service river came river came National Park Service dates back many millions of years National Park Service timeline of Earth’s history. Grand Canyon river came https://www.nps.gov/grca/learn/nature/geologicformations.htm geologic marvels John Newberry river came Geologic Formations of the Grand Canyon 2 billion years old!