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Stone description: porous
| Wall Number | Country | State | Classification | Source Sort ascending |
|---|---|---|---|---|
| 7LB9 | Hungary | Limestone | Margarethen Leitha Mts. | |
| 14LA37 | Hungary | Limestone | Margarethen Leitha Mts. | |
| 13LA36 | Hungary | Limestone | Margarethen Leitha Mts. | |
| 7LA4 | Hungary | Limestone | Margarethen Leitha Mts. | |
| 14LB37 | Hungary | Limestone | Margarethen Leitha Mts. | |
| 7RA5 | Hungary | Limestone | Margarethen Leitha Mts. | |
| 12LA16 | United States | Iowa | Dolomite | Maquoketa |
| 5RA19 | United States | Ohio | Sandstone | Mansfield |
| 9LB22 | United States | Ohio | Sandstone | Mansfield |
| 7RA7 | Hungary | Limestone | Mannersdorf | |
| 13RA7 | United States | Minnesota | Dolomite | Mankato |
| 8LB35 | United States | Connecticut | Sandstone | Manchester |
| 11RB29 | United States | Virginia | Sandstone | Manassas |
| 8RB16 | United States | Wisconsin | Limestone | Madison |
| 11LA33 | United States | Ohio | Limestone | Lumberton |
| 8RA33 | United States | Colorado | Sandstone | Longmont |
| 9LA22 | United States | Ohio | Sandstone | Logan |
| 6La30 | United States | Kentucky | Sandstone | Livingstone |
| 7LB29 | United States | California | Sandstone | Livermore |
| 8RB39 | United States | New Jersey | Sandstone | Little Falls |
| 5RA11 | United States | Ohio | Sandstone | Lithopolis |
| 5LB27 | Austria | Conglomerate | Lindabrunn | |
| 10LA11 | United States | Ohio | Dolomite | Lima |
| 12RA13 | United States | Ohio | Dolomite | Lima |
| 5RA7 | United States | Ohio | Sandstone | Lewis Mills |
| 11LB26 | United States | Iowa | Sandstone | Lewis |
| 13LB29 | Italy | Limestone | Leghorn | |
| 5RA16 | United States | Ohio | Sandstone | Leesville |
| 6RA11 | United States | Pennsylvania | Sandstone | Layton Station Fayette Co. |
| 11C | United States | Indiana | Limestone | Lawrence Co. |
| 5C | United States | Indiana | Limestone | Lawrence Co. |
| 11RB45 | United States | New Mexico | Sandstone | Las Vegas |
| 8La47 | United States | New Mexico | Sandstone | Las Vegas |
| 7RA44 | United States | New Mexico | Sandstone | Las Vegas |
| 9Lb44 | United States | Wyoming | Sandstone | Laramie |
| 26WE | United States | Wyoming | Sandstone | Laramie |
| S2-1 | United States | Wyoming | Sandstone | Laramie |
| S2-126 | United States | Wyoming | Sandstone | Laramie |
| 11RB15 | United States | Iowa | Dolomite | Lansing |
| 10LB20 | United States | Ohio | Sandstone | Lancaster |
| 9LA21 | United States | Ohio | Sandstone | Lancaster |
| 13LA5 | United States | Wisconsin | Dolomite | La Crosse |
| 7LB43 | United States | Michigan | Sandstone | L'Anse |
| 7LB45 | United States | Michigan | Sandstone | L'Anse |
| 8RA44 | United States | Michigan | Sandstone | L'Anse |
| 14RA37 | Hungary | Limestone | Kroisbach | |
| 6RB29 | United States | Kentucky | Sandstone | Kirkmansville |
| 7RQ | United States | Ohio | Sandstone | Kipton |
| 5RQ | United States | Ohio | Sandstone | Kipton |
| 9La34 | United States | West Virginia | Sandstone | Kingwood |
| 9RA36 | United States | West Virginia | Sandstone | Kingwood |
| 6RB3 | United States | Pennsylvania | Sandstone | Kiasola Station Beaver Co. |
| 7LA10 | United States | Florida | Limestone | Key West |
| 11LA6 | United States | Minnesota | Dolomite | Kasota |
| 14RB4 | United States | Illinois | Dolomite | Kankakee |
| 12LB22 | United States | Kansas | Limestone | Junction City |
| 9RA33 | United States | Minnesota | Sandstone | Jordan |
| 11LB29 | United States | Missouri | Sandstone | Jones Station Ralls Co. |
| 8LA31 | United States | Kentucky | Sandstone | Johnson Co. |
| 11RB33 | United States | Oregon | Sandstone | Jacksonville |
| 9Lb34 | United States | Oregon | Sandstone | Jacksonville |
| 8RB44 | United States | Michigan | Sandstone | Isle Royale |
| 13LA13 | United States | Iowa | Dolomite | Iowa Falls |
| 9RA12 | United States | Iowa | Limestone | Iowa City |
| 7RB20 | United States | Ohio | Sandstone | Independence |
| 5RB8 | United States | Ohio | Sandstone | Independence |
| 5RA2 | United States | Ohio | Sandstone | Iberia |
| 6RA3 | United States | Pennsylvania | Sandstone | Hummelstown |
| 8LB28 | United States | New York | Sandstone | Hulberton |
| 5RA6 | United States | Ohio | Sandstone | Howard Station Knox Co. |
| 8RA37 | United States | Missouri | Sandstone | Howard Co. |
| 7WE | United States | South Dakota | Sandstone | Hot Springs |
| 11RB26 | United States | South Dakota | Sandstone | Hot Springs |
| 13RA43 | United States | Kentucky | Limestone | Hopkinsville |
| 9Lb17 | United States | Pennsylvania | Sandstone | Homewood |
| 6RA8 | United States | Pennsylvania | Sandstone | Homewood |
| 7La32 | United States | Minnesota | Sandstone | Hinckley |
| 6RA31 | United States | California | Sandstone | Haywards |
| 9RB20 | United States | Ohio | Sandstone | Harmer |
| 6RB5 | United States | Pennsylvania | Sandstone | Greenville |
| 14LB11 | United States | Ohio | Dolomite | Greenfield |
| 10LA25 | United States | Kansas | Limestone | Greeley |
| 5LA28 | United States | Kentucky | Sandstone | Grayson Spgs |
| 7LA28 | United States | Kentucky | Sandstone | Grayson Spgs |
| 10Lb37 | United States | West Virginia | Sandstone | Grafton |
| 6RA16 | United States | Pennsylvania | Sandstone | Goldsboro |
| 11EE | United States | Ohio | Sandstone | Glenmont |
| 15WE | United States | Ohio | Sandstone | Glenmont |
| 24EE | United States | Ohio | Sandstone | Glenmont |
| S1-35 | United States | Ohio | Sandstone | Glenmont |
| 9EE | United States | Ohio | Sandstone | Glenmont |
| 2EE | United States | Ohio | Sandstone | Glenmont |
| 9RA46 | Canada | Sandstone | Georgetown, Ontario | |
| 12RA36 | United States | Kentucky | Limestone | Garrett |
| 6RA9 | United States | Pennsylvania | Sandstone | Garland |
| 6RA14 | United States | Pennsylvania | Sandstone | Fuller |
| 12LA8 | United States | Minnesota | Dolomite | Frontenac |
| 6RB13 | United States | Pennsylvania | Conglomerate | Friedensburg |
| 9LA39 | United States | Indiana | Sandstone | French Lick Twp. |
| 9LB40 | United States | Indiana | Sandstone | French Lick Twp. |