Rico and Hermosa Fms
Pennsylvanian, about 314 to 299 million years old. 10 crags on this site have their map point on it.
The map groups these named formations into this unit: Rico Formation, Hermosa Formation.
What the map says
Arkosic sandstone, conglomerate, shale, and limestone. Includes at base in some areas siltstone and shale of Molas Fm or Larsen Quartzite Lithology: arkose, conglomerate, shale, minor limestone, siltstone.
1:500,000 sheet: Horton and others, 2017, U.S. Geological Survey Data Series 1052 (10 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.
Durango
- West Coast Cliffs57 routes · Hermosa · 7,786 ft
- Power House26 routes · 10,130 ft
- Right Side24 routes · Golf Wall · 8,034 ft
- Country Club Cave18 routes · Golf Wall · 8,059 ft
- Low Angle Wall17 routes · Fume Wall · 6,912 ft
- RV Wall16 routes · 10,602 ft
- Hermosa Park Road Boulders8 boulder problems · Purgatory · 9,029 ft
- Left Side6 routes · Golf Wall · 8,006 ft
- Julia's Spire2 routes · 9,010 ft