One or more Ordovician fms
Ordovician, about 483 to 451 million years old. 12 crags on this site have their map point on it.
The map groups these named formations into this unit: Fremont Limestone, Harding Sandstone, Manitou Limestone.
What the map says
Fremont Limestone, Harding Sandstone, and Manitou Limestone Lithology: limestone, minor sandstone.
1:500,000 sheet: Horton and others, 2017, U.S. Geological Survey Data Series 1052 (12 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.
Canon City
- The Bank345 routes and 24 boulder problems · Shelf Road · 7,269 ft · limestone (another source)
- The Gallery198 routes · Shelf Road · 6,704 ft · limestone (another source)
- Sand Gulch123 routes and 5 boulder problems · Shelf Road · 6,712 ft · limestone (another source)
- The Gym82 routes and 1 boulder problem · Shelf Road · 6,944 ft · limestone (another source)
- The Dark Side67 routes · Shelf Road · 6,769 ft · limestone (another source)
- The Vault37 routes · Shelf Road · 6,848 ft · limestone (another source)
- The North End29 routes · Shelf Road · 7,056 ft · limestone (another source)
- The North Gym29 routes · Shelf Road · 7,013 ft · limestone (another source)
- The Great Black North25 routes · Shelf Road · 7,108 ft · limestone (another source)
- Cash Wall15 routes · Shelf Road · 6,986 ft · limestone (another source)
- The Bach Block12 routes · Shelf Road · 6,542 ft · limestone (another source)
- University Wall5 routes · Shelf Road · 6,358 ft · limestone (another source)