Eagle Valley Fm
Pennsylvanian, about 308 to 306 million years old. 7 crags on this site have their map point on it.
What the map says
Siltstone, shale, and local gypsum Lithology: siltstone, shale, minor gypsum.
1:500,000 sheet: Horton and others, 2017, U.S. Geological Survey Data Series 1052 (7 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.
Carbondale Area
- Narrows Proper16 routes · Narrows, The · 7,150 ft
- The Front Porch11 routes · Narrows, The · 7,150 ft
- The Gash9 routes · Narrows, The · 7,262 ft
- The Schoolyard9 routes · Narrows, The · 7,219 ft
- The Industrial Wall7 routes · Narrows, The · 7,150 ft
- The Watchtower6 routes · Narrows, The · 7,150 ft
- The Inertia Wall4 routes · Narrows, The · 7,296 ft