Grand Canyon NPS:
Grand Canyon National Park: Phantom Boat Beach 0620
Grand Canyon NPS:
Grand Canyon National Park: Basement Rocks 0629
Grand Canyon NPS:
Grand Canyon National Park: Clear Creek Trail - View Upriver 2967
Grand Canyon NPS:
Grand Canyon National Park: Colorado River Runners 2804
Grand Canyon NPS:
Grand Canyon National Park- Basement Rocks_0201
Grand Canyon NPS:
Grand Canyon National Park- Detail of Basement Rock_0109
Grand Canyon NPS:
Grand Canyon National Park- Basement Rocks_0204
Grand Canyon NPS:
Grand Canyon Zoroaster Granite Detail_3682