Upper Argillite Alley
Lenape Tribes used the abundant Hunterdon mineral for arrowheads and tools. One of their trade routes, later the Easton-Trenton Road, ran southwards toward Sanhican (Trenton).
Marker is on New Jersey Route 31 at milepost 13.6, 0.4 miles east of County Route 579, on the right when traveling south.
Courtesy hmdb.org
