Older glacial drift
Pleistocene, about 1.8 to 0.1 million years old. 9 crags on this site have their map point on it.
What the map says
The sheet gives no description for this unit. Lithology: unconsolidated drift.
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.
Steamboat Springs
- Shield of the Titans6 routes · Hole in the Wall Canyon · 8,450 ft
- Stump Buttress5 routes · Hole in the Wall Canyon · 8,450 ft
- Strip Mall4 routes · Hole in the Wall Canyon · 8,451 ft
- The Needle3 routes · Hole in the Wall Canyon · 8,450 ft
- Wall Mart2 routes · Hole in the Wall Canyon · 8,450 ft
- Peak 11,7771 route · Mt. Zirkel Wilderness · 7,847 ft