Louviers Alluvium
Cenozoic, about 2.6 to 0.0 million years old. 2 crags on this site have their map point on it.
What the map says
Reddish-brown pebbly to bouldery well stratified alluvium along perennial streams and sandy to clayey alluvium along intermittent streams. Well developed Brown soil profile underies surface of deposit. Terrace surface is 70 feet (21.5 m) above major stre
1:100,000 sheet: Colton, Roger B., 1976, U.S. Geological Survey Geologic Investigations Series I-855-G (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.