Georges Basin

Overview
Georges Basin is the deepest of the three large basins in the Gulf of Maine.

Surface area
1,587 mi2

Depth
~370 m (deepest point in the Gulf of Maine)

Bathymetry including key features
Thick deposits of mud obscure the bathymetry of the underlying bedrock features in Georges Basin.1 The surface of the bottom is featureless except for small mounds.2

Substrate
Georges Basin is covered in thick deposits of mud.3,4 The sediment-water interface within Georges Basin is characterized by a layer of turbid water that is tens of meters deep. The turbidity of due to the suspension of fine particles.5

Relationship to large-scale circulatory patterns of the Gulf of Maine
Water from the continental slope enters the Gulf of Maine at depth through the Northeast Channel and accumulates in Georges Basin.6 A portion of the Gulf’s coastal current that turns offshore at Penobscot Bay. Some of this current is entrained in turn by a gyre that flows in a counterclockwise direction over Georges basin.7,8

Information on average (seasonal/annual) oceanographic conditions
The oceanography of Georges Basin is characterized by a counter clockwise gyre. These currents are strongest in the spring and summer. It is estimated that the deep waters of the Gulf of Maine, such as in Georges Basin, are replaced every 10-12 months.9

1 New England Fisheries Management Council, 2004
2 Valentine, 2002
3 New England Fisheries Management Council, 2004
4 Dorsey and Pederson, 1998
5 Pilskaln, et al., 1998
6 Nova Scotia Museum of Natural History. Undatedc
7 Xue et a., 2000
8 Pettigrew, et al., 2005
9 Xue, et al., 2000