ABSTRACT
The surface sediment distribution in the Georges Bank region of the continental shelf reflects the glacial source of the sediments and reworking of the sediments by the currents since the last rise in sea level. Direct observations of the frequency, direction, and extent of sediment movement and of processes causing sediment resuspension and scour have been made at several locations on Georges Bank using a tripod-mounted instrument system that measures bottom current, temperature, light, and pressure. Georges Bank is a shallow submarine bank located at the mouth of the Gulf of Maine. The southern limit of the glacial ice was probably along a line extending from the crest of Georges Bank across Great South Channel to Nantucket Island. The tidal currents are sufficiently strong to mix the water column on the crest of the bank throughout the year. On the crest of Georges Bank and on Nantucket Shoals the surface sediments are fine sand and coarser materials.
