In addition to the moraines, the melting ice sheet produced extensive outwash plains composed of mixed sediments and ice that bordered the bay to the northwest and west. Melting ice blocks in the outwash deposits formed distinctive circular features called kettle lakes. Numerous examples of kettle lakes can be found to the northwest of the Cape Cod Canal. Finally, waters released from the melting ice sheet raised sea level by 60-120 meters (198-396 feet) and drowned preexisting outwash channels. Buzzards Bay attained its broad current configuration approximately 15,000 years ago; the current sea level was present approximately 3,500 years ago.
The combination of shallow depth, tidal action and surface waves promotes mixing of the estuarine waters leading to a productive aquatic ecosystem. Like many estuaries, however, increasing development and land-use change by the surrounding communities are accompanied by nutrient runoff leading to eutrophication (an increase in nutrient levels leading to oxygen depletion) in the smaller embayments. Decreases in eelgrass, scallops, and herring have also been noted, but direct cause-and-effect relationships are not clear. Coordinated management efforts in Buzzards Bay have helped to decrease shellfish closures, conserve habitat for sea birds, and preserve open space.
In 1991, towns located on Buzzards Bay suffered the worst effects from the storm surge of Hurricane Bob.
Bays of the United States | Geography of Massachusetts | バザーズ湾
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