Boulders, cobblestones, and pebbles represent a glacial legacy shared by the northernmost states and Canada. The impact of glacial action has left behind an abundant supply of rounded stones. Even today, 12,000 years after the glacier’s retreat, wave action along 8,117 miles of Great Lakes shorelines continues to polish boulders into cobbles, cobbles into pebbles, and eventually, pebbles into sand.
The uniqueness of American cobblestone construction lies not only in the availability of these natural materials but also in the manipulation and refinement of mortar treatments. One European precedent to American methods can be found in southern England, specifically along the Sussex Coast near Brighton, Worthing, and Shoreham.