Salt Wash Sandstone Member of the Morrison Formation
Sandstone. Late Jurassic, about 157 to 155 million years old. 4 crags on this site have their map point on it.
What the map says
White, gray, rusty-red, and buff sandstone interbedded with red, gray, and green mudstone; thin limestone beds near base. Thickness 100-300 ft. Lithology: clastic; sandstone; mudstone.
1:100,000 sheet: Day and others, 1999, U.S. Geological Survey Open-File Report 99-0427 (4 crags). A contact line at that scale is about 100 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.