2024-03-07
Cobblestone-Cobblestone Masonry
Boulders, cobblestones and pebbles are a glacial legacy shared by our northernmost states and Canada. Glacial action left an inexhaustible supply of rounded stones. Even today, 12,000 years after the retreat of the glacier, wave action along 8,117 miles of Great Lakes shorelines continues to polish boulders into cobbles, cobbles into pebbles and finally pebbles into sand