Bransfield Strait

Bransfield Strait is a body of water between the South Shetland Islands and the Antarctic Peninsula. Its deep basin and active tectonic setting shape regional ocean circulation and geology.

Antarctic Peninsula: A mountainous peninsula extending north from mainland Antarctica toward South America. Its eastern coast forms the strait’s southern boundary.
Bransfield Basin: A deep, elongated basin beneath Bransfield Strait, formed by tectonic extension. Its floor is the main deep-sea feature beneath the strait.
Edward Bransfield: An Irish naval officer who charted parts of the Antarctic Peninsula region in 1820. The strait bears his name, reflecting early British surveying in Antarctic waters.
Antarctic krill: A small shrimp-like crustacean that forms a major part of the Southern Ocean food web. Krill support predators and fisheries in waters around the strait.
South Shetland Islands: An island group north of the Antarctic Peninsula in the Southern Ocean. The island chain forms the strait’s northern boundary.
Bransfield Strait Current: A current system flowing along the Antarctic Peninsula side of Bransfield Strait. It carries water through the strait and influences local circulation.
William Smith: A British sealer whose 1819 voyage reported the South Shetland Islands. His report helped prompt the exploration that charted the strait.
Antarctic fur seal: A marine mammal that breeds in large colonies on subantarctic and Antarctic islands. Colonies on nearby islands depend on prey in the strait’s ecosystem.
Drake Passage: The ocean passage between Cape Horn and the South Shetland Islands. It connects the strait’s western approaches with the wider Southern Ocean.
Bransfield Strait Rift: An active extensional zone beneath Bransfield Strait where the crust is pulling apart. Rifting accounts for the basin’s tectonic activity and volcanic setting.

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