*** About Grand Canyon: The Grand Canyon, a UNESCO World Heritage site, is renowned for its overwhelming size and its intricate and colorful landscape. Geologically, it is significant because of the thick sequence of ancient rocks that are beautifully preserved and exposed in the walls of the trench. These rock layers record much of the early geologic history of the North American continent. Often over a mile deep, the Canyon provides a stunning visual record of the Paleozoic era, with nearly two billion years of Earth's geological history eroded slowly by the Colorado River. Its immense size and unique combinations of geological color and erosional forms are mesmerizing for both scientists and tourists.

Image ID: 90860

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