Free-air gravity anomaly map of the Long Island Platform

The U.S. Geological Survey (USGS) has collected marine gravity data along the U.S. Atlantic continental margin during the last decade. This map of the Long Island platform combines the data used to make the preliminary free-air gravity anomaly map of the Atlantic continental margin (Grow and others, 1976) with the new gravity values collected aboard the RV Gilliss in 1979 and the RV Gyre in 1981.

Carl Bowin provided the USNS Kealthley data from the Woods Hole Oceanographic Institution gravity data-base. We thank Bab Bowles (USGS) for his advice on editing the navigation and gravity data.