Wall Number | Country | State | Classification | Source Sort descending |
---|---|---|---|---|
9LA31 | United States | New York | Argillite (Slate) | Granville |
9RA30 | United States | New York | Argillite (Slate) | Hampton |
10RB30 | United States | New York | Argillite (Slate) | Middle Granville |
6RA41 | United States | Maryland | Argillite (Slate) | Nr. Cardiff |