View from the Grand Canyon’s South Rim onto Nankoweap Delta. Remnants of a past natural dam created by a landslide are visible on the far side of the Colorado River, just to the left of the dry bed of Nankoweap Creek. Was this Grand Canyon landslide caused by the impact that created Meteor Crater? Image via Richard Hereford/ University of Arizona.The University of Arizona News published this story on July 15, 2025. Edits by EarthSky.