This is the cleft boulder from which the
Split Rock Reservoir in Rockaway Township, N.J. derives its name. Submerged
after construction of the new dam in 1947/48, the famous landmark was exposed
during the prolonged drought of 2001. It is located at the head of the earlier
Split Rock pond, now the south end of the large island in the present reservoir.
Native American artifacts were found in the area.