Skip to main content
U.S. flag

An official website of the United States government

Dot gov

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

Https

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: Potsdam

Wall Number Sort descending Country State Classification Source
6RB13 United States Pennsylvania Conglomerate Friedensburg
7LB43 United States Michigan Sandstone L'Anse
7LB45 United States Michigan Sandstone L'Anse
7RA42 United States Michigan Sandstone Marquette
8RA44 United States Michigan Sandstone L'Anse
8RB44 United States Michigan Sandstone Isle Royale
9Lb35 United States South Dakota Quartzite Sioux Falls
9RB43 Canada Sandstone Nepigon Bay, Ontario