This study is based on the interpretation of echogram profiles, high resolution seismic reflection records, bottom dredge and grab samples, piston cores, bottom photographs, and adjacent land geology. The report is accompanied by Map 4011-G prepared at a scale of 1:300 000. Five sedimentary surficial units occur within the map-area and are continuous from the adjacent Scotian Shelf. The surficial sediments in the Gulf of Maine are mostly relict while those in the Bay of Fundy are presently undergoing change. The distribution and stratigraphic relationships of the surficial units were controlled to a large extent by late and post-glacio-isostataic and glacio-eustatic fluctuations.