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Stone description: porous
| Wall Number Sort descending | Country | State | Classification | Source |
|---|---|---|---|---|
| 5RA9 | United States | Ohio | Sandstone | Belleville |
| 5RB1 | United States | Ohio | Sandstone | Amherst |
| 5RB2 | United States | Ohio | Sandstone | Canal Dover Tuscarawas Co. |
| 5RB3 | United States | Ohio | Sandstone | Bedford |
| 5RB4 | United States | Ohio | Sandstone | Bellaire |
| 5RB5 | United States | Ohio | Sandstone | Brownhelm |
| 5RB6 | United States | Ohio | Sandstone | Cumberland |
| 5RB8 | United States | Ohio | Sandstone | Independence |
| 5RQ | United States | Ohio | Sandstone | Kipton |
| 6C | United States | Indiana | Limestone | ? |
| 6EE | United States | Ohio | Sandstone | McDermott |
| 6L48 | United States | North Carolina | Sandstone | Raleigh |
| 6La10 | United States | Pennsylvania | Sandstone | Stoneboro |
| 6LA12 | United States | Pennsylvania | Sandstone | Reading |
| 6La13 | United States | Pennsylvania | Sandstone | Monongahela City |
| 6LA15 | United States | Pennsylvania | Sandstone | Washington |
| 6La16 | United States | Pennsylvania | Sandstone | Titusville |
| 6LA20 | United States | Ohio | Sandstone | Newark |
| 6LA21 | United States | Ohio | Sandstone | Warwick |
| 6LA3 | United States | Pennsylvania | Sandstone | Wampum |
| 6La30 | United States | Kentucky | Sandstone | Livingstone |
| 6La4 | United States | Pennsylvania | Sandstone | Wampum |
| 6LA42 | United States | New Jersey | Sandstone | Stockton |
| 6LA43 | United States | New Jersey | Sandstone | Pleasant Val. |
| 6LA46 | United States | Michigan | Sandstone | Portage Entry |
| 6LA47 | United States | Louisiana | Sandstone | Unknown |
| 6LA5 | United States | Pennsylvania | Sandstone | Scranton |
| 6La9 | United States | Pennsylvania | Sandstone | Waynesburgh |
| 6LB11 | United States | Pennsylvania | Sandstone | Sharon |
| 6LB12 | United States | Pennsylvania | Sandstone | Norristown |
| 6LB13 | United States | Pennsylvania | Sandstone | Beaver Falls |
| 6LB20 | United States | Ohio | Sandstone | Sunbury |
| 6LB21 | United States | Ohio | Sandstone | Millersburg |
| 6LB3 | United States | Pennsylvania | Sandstone | Oil City |
| 6LB30 | United States | Kentucky | Sandstone | Cloveport |
| 6LB39 | United States | Ohio | Sandstone | Youngstown |
| 6LB7 | United States | Pennsylvania | Sandstone | Yardleyville |
| 6LB9 | United States | Pennsylvania | Sandstone | Baden |
| 6R48 | United States | North Carolina | Sandstone | Raleigh |
| 6RA11 | United States | Pennsylvania | Sandstone | Layton Station Fayette Co. |
| 6RA14 | United States | Pennsylvania | Sandstone | Fuller |
| 6RA15 | United States | Pennsylvania | Sandstone | Connellsville |
| 6RA16 | United States | Pennsylvania | Sandstone | Goldsboro |
| 6RA21 | United States | Ohio | Sandstone | Ridgeville |
| 6RA3 | United States | Pennsylvania | Sandstone | Hummelstown |
| 6RA30 | United States | Kentucky | Sandstone | Whitney Co. |
| 6RA31 | United States | California | Sandstone | Haywards |
| 6RA4 | United States | Pennsylvania | Sandstone | Connellsville |
| 6RA6 | United States | Pennsylvania | Sandstone | Farrandsville |
| 6RA8 | United States | Pennsylvania | Sandstone | Homewood |
| 6RA9 | United States | Pennsylvania | Sandstone | Garland |
| 6RB13 | United States | Pennsylvania | Conglomerate | Friedensburg |
| 6RB16 | United States | Pennsylvania | Diabase | Round Top Gettysburg |
| 6RB2 | United States | Pennsylvania | Sandstone | Franklin |
| 6RB20 | United States | Ohio | Sandstone | Amherst |
| 6RB21 | United States | Ohio | Sandstone | Marietta |
| 6RB29 | United States | Kentucky | Sandstone | Kirkmansville |
| 6RB3 | United States | Pennsylvania | Sandstone | Kiasola Station Beaver Co. |
| 6RB30 | United States | California | Sandstone | Alameda |
| 6RB37 | Mexico | Tuff | Oaxaca State | |
| 6RB39 | United States | Ohio | Sandstone | Sunbury |
| 6RB5 | United States | Pennsylvania | Sandstone | Greenville |
| 6RB7 | United States | Pennsylvania | Sandstone | Cannonsburgh |
| 6RB8 | United States | Pennsylvania | Sandstone | Black Walnut |
| 6RQ | United States | Ohio | Sandstone | McDermont |
| 6WE | United States | Ohio | Sandstone | Amherst |
| 7C | United States | Indiana | Limestone | Bloomington |
| 7EE | United States | Ohio | Sandstone | McDermott |
| 7LA10 | United States | Florida | Limestone | Key West |
| 7LA19 | United States | Ohio | Sandstone | Akron |
| 7LA28 | United States | Kentucky | Sandstone | Grayson Spgs |
| 7LA31 | United States | Colorado | Sandstone | Fort Collins |
| 7La32 | United States | Minnesota | Sandstone | Hinckley |
| 7La33 | United States | Connecticut | Sandstone | Cromwell |
| 7LA39 | United States | New Jersey | Sandstone | Patterson |
| 7LA4 | Hungary | Limestone | Margarethen Leitha Mts. | |
| 7LA40 | United States | New Jersey | Sandstone | Orange Mt. |
| 7LA45 | United States | New Mexico | Sandstone | Santa Fe |
| 7Lb19 | United States | Ohio | Sandstone | Portsmouth |
| 7LB29 | United States | California | Sandstone | Livermore |
| 7LB39 | United States | New Jersey | Sandstone | Pleasant Val. |
| 7LB40 | United States | New Jersey | Sandstone | Newark |
| 7LB43 | United States | Michigan | Sandstone | L'Anse |
| 7LB44 | United States | Michigan | Sandstone | Stony Point |
| 7LB45 | United States | Michigan | Sandstone | L'Anse |
| 7LB9 | Hungary | Limestone | Margarethen Leitha Mts. | |
| 7RA19 | United States | Ohio | Sandstone | Carrollton |
| 7RA20 | United States | Ohio | Sandstone | Elyria |
| 7RA28 | United States | Kentucky | Sandstone | Cloveport |
| 7RA29 | United States | California | Sandstone | Angel Island |
| 7RA31 | United States | Colorado | Sandstone | Coal Creek |
| 7RA39 | United States | New Jersey | Sandstone | Belleville |
| 7RA42 | United States | Michigan | Sandstone | Marquette |
| 7RA44 | United States | New Mexico | Sandstone | Las Vegas |
| 7RA5 | Hungary | Limestone | Margarethen Leitha Mts. | |
| 7RA7 | Hungary | Limestone | Mannersdorf | |
| 7RB19 | United States | Ohio | Sandstone | Amherst |
| 7RB20 | United States | Ohio | Sandstone | Independence |
| 7RB25 | United States | New York | Sandstone | Margarettville |
| 7RB28 | United States | California | Sandstone | Sites |