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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]
The Dox Formation, also known as the Dox Sandstone, is a Mesoproterozoic rock formation that outcrops in the eastern Grand Canyon, Coconino County, Arizona.The Dox Formation comprises the bulk of the Unkar Group, the older subdivision of the Grand Canyon Supergroup.
Swilling Butte is a 6,785-foot (2,068 m)-elevation ridgeline summit located in the eastern Grand Canyon, in Coconino County of northern Arizona, United States.The landform is in a group of nearby summits, Colter Butte, west, and Hutton and Duppa Buttes, east.
The Cardenas Basalt, also known as either the Cardenas Lava or Cardenas Lavas, is a rock formation that outcrops over an area of about 310 km 2 (120 mi 2) in the eastern Grand Canyon, Coconino County, Arizona.
In the northeast Grand Canyon, the Tapeats is still the defining cliff unit at the Great Unconformity between the paleozoic Tapeats Sandstone and the basement geology below. However, the entire east of the Kaibab Plateau is an uplifted side of the East Kaibab Monocline . [ 11 ]
A geologic cross section of the Grand Canyon. [ 4 ] The Unkar Group is a sequence of strata of Proterozoic age that are subdivided into five geologic formations and exposed within the Grand Canyon , Arizona , Southwestern United States .
The strata of the Nankoweap Formation are exposed in a small area that occupies an area from just south of Carbon Canyon to Basalt Canyon on the west bank of the Colorado River around Comanche Creek and Tanner Canyon on the east bank of the Colorado River within the eastern Grand Canyon, Coconino County, Arizona.
It and the other formations of the Tonto Group outcrop in the Grand Canyon, Arizona, and parts of northern Arizona, central Arizona, southeast California, southern Nevada, and southeast Utah. The Bright Angel Shale consists of locally fossiliferous , green and red-brown, micaceous, fissile shale (mudstone) and siltstone with local, thicker beds ...