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Stone description: porous
| Wall Number Sort ascending | Country | State | Classification | Source |
|---|---|---|---|---|
| 8RA26 | United States | North Carolina | Sandstone | Morrisville |
| 8RA25 | United States | North Carolina | Sandstone | Egypt |
| 8RA24 | United States | North Carolina | Sandstone | Durham |
| 8RA23 | United States | Massachusetts | Sandstone | E. Long Meadow |
| 8RA21 | United States | Ohio | Sandstone | Brooklyn |
| 8RA20 | United States | Ohio | Sandstone | Elyria |
| 8RA16 | United States | Indiana | Limestone | Ellettsville |
| 8r48 | United States | Ohio | Sandstone | Berea |
| 8LB47 | United States | New Mexico | Sandstone | Valencia Co. |
| 8LB39 | United States | West Virginia | Sandstone | Wheeling |
| 8LB38 | United States | Arizona | Sandstone | Yavapai Co. |
| 8LB37 | United States | Missouri | Sandstone | Rockville |
| 8LB36 | Scotland | Sandstone | Thurso | |
| 8LB35 | United States | Connecticut | Sandstone | Manchester |
| 8LB34 | United States | Minnesota | Sandstone | Mendota |
| 8LB33 | United States | Colorado | Sandstone | Canon City |
| 8Lb32 | United States | Texas | Sandstone | Riverside |
| 8LB31 | United States | Kentucky | Sandstone | Cloveport |
| 8LB28 | United States | New York | Sandstone | Hulberton |
| 8LB21 | United States | Ohio | Sandstone | Steubensville Jefferson Co. |
| 8LB20 | United States | Ohio | Sandstone | Berea |
| 8La47 | United States | New Mexico | Sandstone | Las Vegas |
| 8LA43 | United States | Montana | Sandstone | Columbus |
| 8LA42 | United States | New Jersey | Sandstone | Newark |
| 8LA39 | United States | Kansas | Sandstone | Oswego |
| 8LA37 | United States | Missouri | Sandstone | Warrensburg |
| 8LA36 | United States | Missouri | Sandstone | Clinton |
| 8LA35 | United States | Connecticut | Sandstone | E. Haven |
| 8LA31 | United States | Kentucky | Sandstone | Johnson Co. |
| 8LA26 | United States | North Carolina | Sandstone | Wadesboro |
| 8LA24 | United States | North Carolina | Sandstone | Sanford |
| 8LA21 | United States | Ohio | Sandstone | Steubensville Jefferson Co. |
| 8LA20 | United States | Ohio | Sandstone | Portsmouth |
| 8L48 | United States | Ohio | Sandstone | Berea |
| 8EE | United States | Ohio | Sandstone | Amherst |
| 8C | United States | Indiana | Limestone | Bloomington |
| 7WE | United States | South Dakota | Sandstone | Hot Springs |
| 7RQ | United States | Ohio | Sandstone | Kipton |
| 7RB42 | United States | Michigan | Sandstone | Marquette |
| 7RB39 | United States | New Jersey | Sandstone | Avondale |
| 7RB36 | United States | Nevada | Sandstone | Carson City |
| 7RB30 | United States | Texas | Sandstone | Milsap |
| 7RB28 | United States | California | Sandstone | Sites |
| 7RB25 | United States | New York | Sandstone | Margarettville |
| 7RB20 | United States | Ohio | Sandstone | Independence |
| 7RB19 | United States | Ohio | Sandstone | Amherst |
| 7RA7 | Hungary | Limestone | Mannersdorf | |
| 7RA5 | Hungary | Limestone | Margarethen Leitha Mts. | |
| 7RA44 | United States | New Mexico | Sandstone | Las Vegas |
| 7RA42 | United States | Michigan | Sandstone | Marquette |
| 7RA39 | United States | New Jersey | Sandstone | Belleville |
| 7RA31 | United States | Colorado | Sandstone | Coal Creek |
| 7RA29 | United States | California | Sandstone | Angel Island |
| 7RA28 | United States | Kentucky | Sandstone | Cloveport |
| 7RA20 | United States | Ohio | Sandstone | Elyria |
| 7RA19 | United States | Ohio | Sandstone | Carrollton |
| 7LB9 | Hungary | Limestone | Margarethen Leitha Mts. | |
| 7LB45 | United States | Michigan | Sandstone | L'Anse |
| 7LB44 | United States | Michigan | Sandstone | Stony Point |
| 7LB43 | United States | Michigan | Sandstone | L'Anse |
| 7LB40 | United States | New Jersey | Sandstone | Newark |
| 7LB39 | United States | New Jersey | Sandstone | Pleasant Val. |
| 7LB29 | United States | California | Sandstone | Livermore |
| 7Lb19 | United States | Ohio | Sandstone | Portsmouth |
| 7LA45 | United States | New Mexico | Sandstone | Santa Fe |
| 7LA40 | United States | New Jersey | Sandstone | Orange Mt. |
| 7LA4 | Hungary | Limestone | Margarethen Leitha Mts. | |
| 7LA39 | United States | New Jersey | Sandstone | Patterson |
| 7La33 | United States | Connecticut | Sandstone | Cromwell |
| 7La32 | United States | Minnesota | Sandstone | Hinckley |
| 7LA31 | United States | Colorado | Sandstone | Fort Collins |
| 7LA28 | United States | Kentucky | Sandstone | Grayson Spgs |
| 7LA19 | United States | Ohio | Sandstone | Akron |
| 7LA10 | United States | Florida | Limestone | Key West |
| 7EE | United States | Ohio | Sandstone | McDermott |
| 7C | United States | Indiana | Limestone | Bloomington |
| 6WE | United States | Ohio | Sandstone | Amherst |
| 6RQ | United States | Ohio | Sandstone | McDermont |
| 6RB8 | United States | Pennsylvania | Sandstone | Black Walnut |
| 6RB7 | United States | Pennsylvania | Sandstone | Cannonsburgh |
| 6RB5 | United States | Pennsylvania | Sandstone | Greenville |
| 6RB39 | United States | Ohio | Sandstone | Sunbury |
| 6RB37 | Mexico | Tuff | Oaxaca State | |
| 6RB30 | United States | California | Sandstone | Alameda |
| 6RB3 | United States | Pennsylvania | Sandstone | Kiasola Station Beaver Co. |
| 6RB29 | United States | Kentucky | Sandstone | Kirkmansville |
| 6RB21 | United States | Ohio | Sandstone | Marietta |
| 6RB20 | United States | Ohio | Sandstone | Amherst |
| 6RB2 | United States | Pennsylvania | Sandstone | Franklin |
| 6RB16 | United States | Pennsylvania | Diabase | Round Top Gettysburg |
| 6RB13 | United States | Pennsylvania | Conglomerate | Friedensburg |
| 6RA9 | United States | Pennsylvania | Sandstone | Garland |
| 6RA8 | United States | Pennsylvania | Sandstone | Homewood |
| 6RA6 | United States | Pennsylvania | Sandstone | Farrandsville |
| 6RA4 | United States | Pennsylvania | Sandstone | Connellsville |
| 6RA31 | United States | California | Sandstone | Haywards |
| 6RA30 | United States | Kentucky | Sandstone | Whitney Co. |
| 6RA3 | United States | Pennsylvania | Sandstone | Hummelstown |
| 6RA21 | United States | Ohio | Sandstone | Ridgeville |
| 6RA16 | United States | Pennsylvania | Sandstone | Goldsboro |