Mountain valley alluvium
Quaternary, younger than 126,000 years. 2 crags on this site have their map point on it.
What the map says
Pebbly to bouldery gravel, sand, and minor deposits of silty alluvium in stream channels, floodplains, and low terraces along courses of major and tributary streams in the mountains west of the foothills hogback belt and along the Laramie River near the northwest corner of the quadrangle. Unit Qva locally includes outwash deposits (Qgp) downstream from till of Pinedale age (Qtp), small fans deposits (Qf) and minor deposits of colluvium (Qc) along valley margins, as well as organic-rich sediments (Qo) in bogs, fens, marshes, and meadows. Deposits of unit Qva, near cirques in the Medicine Bow Mountains, locally may include outwash deposits of post-Pinedale age. Unit is chiefly present along the Cache la Poudre River, Laramie River, and their tributaries. Outwash deposits are a potential source of coarse aggregate. Low-lying deposits are prone to periodic flooding. Estimated thickness is 3–9 m Lithology: gravel, sand, alluvium.
1:100,000 sheet: Workman and others, 2018, U.S. Geological Survey Scientific Investigations Map 3399 (2 crags). A contact line at that scale is about 100 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.