Hermosa Fm
Pennsylvanian, about 314 to 304 million years old. 9 crags on this site have their map point on it.
What the map says
Arkosic sandstone, conglomerate, shale, and limestone; gypsum and salt in Paradox Member present in salt anticlines near Utah border Lithology: arkose, conglomerate, shale, minor limestone, gypsum.
1:500,000 sheet: Horton and others, 2017, U.S. Geological Survey Data Series 1052 (9 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.
Ouray vicinity (rock)
- Overlook Cliff32 routes · 8,641 ft
- The Alcove23 routes · Pool Wall, The · 7,811 ft
- The Deep End14 routes · Pool Wall, The · 8,009 ft
- Bay of Pigs13 routes · Pool Wall, The · 7,945 ft
- The Upper Wall8 routes · Pool Wall, The · 7,945 ft
- The Wading Pool8 routes · Pool Wall, The · 7,912 ft
- Upper Cascade Wall6 routes · 10,073 ft
- The Backyard2 routes · Pool Wall, The · 7,945 ft
- Sandias1 route · 8,169 ft