Deep Cut Guide

Uncompahgre Fm

Statherian, about 1,660 to 1,610 million years old. 12 crags on this site have their map point on it.

What the map says

Quartzite, slate, and phyllite Lithology: quartzite, slate, phyllite.

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.

Ouray vicinity (rock)

Alpine Rock

Every mapped unit with a crag on it.