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Coconino Sandstone is a geologic formation named after its exposure in Coconino County, Arizona. This formation spreads across the Colorado Plateau province of the United States , including northern Arizona , northwest Colorado , Nevada , and Utah .
The Middle Permian Toroweap Formation is a thin, darker geologic unit, between the brighter colored units of the Kaibab Limestone above, and Coconino Sandstone below. It is a prominent unit in Grand Canyon, Arizona, Southwestern United States, found through sections of the South Rim, Grand Canyon, and the North Rim, of the Kaibab Plateau; also the Kaibab's southeast extension to Cape Royal ...
Lizard-like animals left their footprints in Coconino Sandstone. Coconino Sandstone formed about 275 million years ago as the area dried out and sand dunes made of quartz sand invaded a growing desert (see 6b in figure 1). [11] Some Coconino fills deep mudcracks in the underlying Hermit Shale [41] and the desert that created the Coconino lasted ...
The rock unit sequences are as follows: Coconino Sandstone, (prominence, Permian unit) Hermit Shale, Permian; Supai Group, (4 units, Pennsylvanian-Permian) 4 – Esplanade Sandstone, (Permian) (Typically forms a resistant (& thick) cliff, thickening in Western Grand Canyon) 3 – Wescogame Formation
As defined by Darton, the Supai formation included all Pennsylvanian-Permian strata, mostly red beds, lying between the Redwall Limestone and the Coconino Sandstone in the Grand Canyon region. In 1923, Noble [2] recognized and separated the strata now comprising the Hermit Shale from the top of Darton's Supai.
The Aubrey Cliffs are composed of the Permian rocks on top, [1] Kaibab Limestone, Toroweap Formation and Coconino Sandstone; also the Hermit Formation and Supai Group; at lower elevations (the Esplanade Sandstone member of The Esplanade, Grand Canyon). In the south at Aubrey Valley, the Coconino Sandstone is reduced to a thin member, compared ...
The Lower Permian Esplanade Sandstone is a cliff-forming, resistant sandstone, dark red, geologic unit found in the Grand Canyon.The rock unit forms a resistant shelf in the west Grand Canyon, south side of the Colorado River, at the east of the Toroweap Fault, down-dropped to west, southeast of Toroweap Overlook (North Rim, at Lava Falls), and west of Havasupai.
The summit dome is composed of cream-colored Permian Coconino Sandstone. [6] This sandstone, which is the third-youngest stratum in the Grand Canyon, was deposited 265 million years ago as sand dunes. Below the Coconino Sandstone is reddish, slope-forming, Permian Hermit Formation, which in turn overlays the Pennsylvanian-Permian Supai Group.