The distribution of polystyrene spheres and nibs in Block Island Sound during 1972–1973

Recent investigations have shown the pelagic distribution of plastic particles in the ocean to be widespread; and their source and fate have been the subject of considerable discussion in the United States. In the waters of Block Island Sound there is a seasonal fluctuation in their abundance. Their source appears to be Long Island Sound, probably originating from the rivers on the Connecticut Shore. They are transported out to sea by the action of the tidal currents in the upper 10–15 meters of the water column.