Wall Number | Country | State Sort ascending | Classification | Source |
---|---|---|---|---|
6RA33 | United States | Colorado | Sandstone | Greeley |
9RA3 | United States | Colorado | Limestone | Morrison |
8RB21 | United States | Ohio | Sandstone | Amherst |
9LB40 | United States | Indiana | Sandstone | French Lick Twp. |