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The Drake Passage is the body of water between South America's Cape Horn, Chile, Argentina, and the South Shetland Islands of Antarctica. It connects the southwestern part of the Atlantic Ocean (Scotia Sea) with the southeastern part of the Pacific Ocean and extends into the Southern Ocean. The passage is named after the 16th-century English ...
The major oceanic divisions are defined in part by the continents, various archipelagos, and other criteria. The principal divisions (in descending order of area) are the: Pacific Ocean, Atlantic Ocean, Indian Ocean, Southern (Antarctic) Ocean, and Arctic Ocean. Smaller regions of the oceans are called seas, gulfs, bays, straits, and other terms.
The Chile Triple Junction (or Chile Margin Triple Junction) is a geologic triple junction located on the seafloor of the Pacific Ocean off Taitao and Tres Montes Peninsula on the southern coast of Chile. Here three tectonic plates meet: the South American Plate, the Nazca Plate and the Antarctic Plate. This triple junction is unusual in that it ...
Coordinates: 58°S 15°W. Bathymetric map of the South American-Antarctic Ridge. The South American–Antarctic Ridge or simply American-Antarctic Ridge (SAAR or AAR) (in Spanish: Dorsal Antártico-Americana) is the tectonic spreading center between the South American Plate and the Antarctic Plate. It runs along the sea-floor from the Bouvet ...
t. e. The Southern Ocean, also known as the Antarctic Ocean, [1][note 4] comprises the southernmost waters of the world ocean, generally taken to be south of 60° S latitude and encircling Antarctica. [5] With a size of 20,327,000 km 2 (7,848,000 sq mi), it is the second-smallest of the five principal oceanic divisions, smaller than the Pacific ...
the delineation between North and South America in the Caribbean Sea; the delineation of Antarctica from Africa, Australia, and South America in the Indian, South Pacific, and South Atlantic oceans, respectively (referred to collectively by some geographers as the Southern Ocean or the Antarctic Ocean);
The Mid-Atlantic Ridge is a mid-ocean ridge (a divergent or constructive plate boundary) located along the floor of the Atlantic Ocean, and part of the longest mountain range in the world. In the North Atlantic, the ridge separates the North American from the Eurasian Plate and the African Plate, north and south of the Azores Triple Junction.
Nazca Plate. The Nazca Plate or Nasca Plate, [2] named after the Nazca region of southern Peru, is an oceanic tectonic plate in the eastern Pacific Ocean basin off the west coast of South America. The ongoing subduction, along the Peru–Chile Trench, of the Nazca Plate under the South American Plate is largely responsible for the Andean orogeny.