Grand Canyon, ArizonaMay 26, 2018/in /by Marli Miller sedimentary, Grand Canyon National Park, desert, stair-step topography, erosion https://geologypics.com/wp-content/uploads/2017/04/geologic-time-pics-logo-300x115.png 0 0 Marli Miller https://geologypics.com/wp-content/uploads/2017/04/geologic-time-pics-logo-300x115.png Marli Miller2018-05-26 22:45:502018-05-26 22:51:54Grand Canyon, Arizona
