Skip to main content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.


The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Stone description: olivine

Wall Number Sort descending Country State Classification Source
10LA30 United States Maine Diabase Vinal Haven
5LB25 United States Maine Diabase Addison Point
5RB33 United States Minnesota Diabase Taylor's Falls
8LA27 United States Maine Diabase Addison Point
S2-82 United States Wisconsin Gabbro Ashland