Fingers of Erosion
Here is a panorama focused on the lower tier of canyons in Canyonlands National Park. As I look at this scene as a geologist, I attempt to imagine the deep past in order to envision how this erosion happened. I first picture the river as it ate away at the top of the canyon. It then meandered back and forth, working down to the hard, white sandstone layer capping what is now the lower tier of canyons, then eventually it found a toehold on the softer sandstone below and started downcutting again. As I took this photo, the river was doing what it has been doing for millions of years, but I can only see one, brief snapshot of its work.