Piney Creek Alluvium

What the map says

Dark-gray humic sandy to gravelley alluvium containing organic matter, such as roots. Underlies terraces whose surfaces are 10 to 20 feet (3 to 6 m) above a nearby flood plain. Upper part is characterized by weakly developed Brown soil; grades into collu

1:100,000 sheet: Colton, Roger B., 1976, U.S. Geological Survey Geologic Investigations Series I-855-G (5 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.