Formal boundaries of the Franklin - Sterling Hill area

Formal boundaries of the Franklin-Sterling Hill area as provided in Dunn (1995), page 71:

East: The base of the Hamburgh and Sparta mountains.

West: The eastern edge of the Wildcat Band of marble to the place where it plunges beneath the unconformity. The west boundary north of that point is defined by the Wallkill River.

South: Brooks Flat Road in Ogdensburg, just a bit south of Sterling Hill.

North: A line east-west from the intersection or route 23 and route 517 at the Hamburg-Franklin border (formerly known as Hardistonville, and the type locality for the Hardyston Quartzite).