This paper gives the geophysical results and interpretation for a rather close net of gravity and magnetic stations in the southern two‐thirds of New Jersey and eastern Pennsylvania. Over most of the New Jersey parts, the stations are at intervals of about 31/2 miles on profiles roughly ten miles apart, running approximately NW‐SE, or across the strike of the Appalachian trends. This work is supplemented by a zone of much closer control extending in a band about four miles wide reaching from Barnegat Bay on the coast, northwestward through Princeton and Flemington to the Delaware River at Phillipsburg, New Jersey.
