Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Stone description: friable

Wall Number Country State Sort descending Classification Source
14RB36 Spain Limestone Murcia, Murcia
8LB9 Bermuda Limestone Coralline
8RB10 Bermuda Limestone Coralline
10LA37 United States Kansas Sandstone Chanute
10RA33 United States Kansas Sandstone Neodesha
7RA32 United States Minnesota Sandstone Dresback
8RB34 United States Minnesota Sandstone Dakota
6RA20 United States Ohio Sandstone Lancaster
9RA18 United States Pennsylvania Sandstone Meadville
10RB48 United States Wisconsin Sandstone Ableman
7LA10 United States Florida Limestone Key West