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The Granite Gorge Metamorphic Suite consists of lithologic units, the Brahma, Rama, and Vishnu schists, that have been mapped within the Upper, Middle, and Lower Granite Gorges of the Grand Canyon. The Vishnu Schist consists of quartz - mica schist, pelitic schist, and meta- arenites .
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Canyon / Gorge – Deep chasm between cliffs; Chine – Steep-sided river valley; Couloir – Steep, narrow mountain gully; Defile (geography) – Narrow pass or gorge between mountains or hills; Gully – Landform created by running water and/or mass movement eroding sharply into soil; Mountain pass – Route through a mountain range or over a ...
Royal Gorge, Colorado; Ruby Canyon, Colorado and Utah; Sabino Canyon, Arizona; Saint Christopher's Canyon, Aibonito and Barranquitas, Puerto Rico; Salt River Canyon, Arizona; San Rafael River Gorge, Utah; Santa Elena Canyon, Big Bend National Park, Texas (also in Big Bend N.P.: Boquillas and Mariscal Canyons) Smoke Hole Canyon, West Virginia
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[2] [1] The rock forming the canyon is crystalline basement. [3] One feature of the canyon is a dry waterfall. [4] The canyon is bridged by a wooden railroad trestle, the Goat Canyon Trestle, [2] [5] which is the world's largest curved all-wood trestle. [6] The canyon is accessible by trail by traveling west from Mortero Palms. [7]
The resulting Grand Canyon Supergroup of sedimentary units is composed of nine varied geologic formations that were laid down from 1.2 billion and 740 million years ago in this sea. [11] Good exposures of the supergroup can be seen in eastern Grand Canyon in the Inner Gorge and from Desert View, Lipan Point and Moran point. [12] [note 1]
Grand Canyon, Arizona, at the confluence of the Colorado River and Little Colorado River. A canyon (from Spanish: cañón; archaic British English spelling: cañon), [1] gorge or chasm, is a deep cleft between escarpments or cliffs resulting from weathering and the erosive activity of a river over geologic time scales. [2]