Glen Canyon Group and Chinle Fm
Late Triassic, about 237 to 207 million years old. 6 crags on this site have their map point on it.
The map groups these named formations into this unit: Glen Canyon Group, Chinle Formation.
What the map says
In southwest, Glen Canyon Group consists of Navajo Sandstone, Kayenta Fm (red siltstone, shale, and sandstone) and Wingate Sandstone; Chinle is red siltstone Lithology: sandstone, siltstone, shale.
1:500,000 sheet: Horton and others, 2017, U.S. Geological Survey Data Series 1052 (6 crags). A contact line at that scale is about 500 m wide on the ground.
Served by Macrostrat (CC BY 4.0). The wording is the map's own, quoted as a fact about the mapped unit, not about any one wall.
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