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Separating the African (or Nubian–Somali plates) and Antarctic plates, the Southwest Indian Ridge (SWIR) stretches 7,700 km (4,800 mi) from the Atlantic Ocean to the Indian Ocean. With an average spreading rate of 14–15 millimetres per year (0.55–0.59 in/year), the SWIR is one of the slowest-spreading mid-ocean ridges on Earth.
GEBCO is the only intergovernmental body with a mandate to map the whole ocean floor. At the beginning of the project, only 6 per cent of the world's ocean bottom had been surveyed to today's standards; as of June 2022, the project had recorded 23.4 per cent mapped. About 14,500,000 square kilometres (5,600,000 sq mi) of new bathymetric data ...
A bathymetric chart is a type of isarithmic map that depicts the submerged bathymetry and physiographic features of ocean and sea bottoms. [1] Their primary purpose is to provide detailed depth contours of ocean topography as well as provide the size, shape and distribution of underwater features.
The Southeast Indian Ridge (denoted by the yellow line) The Southeast Indian Ridge (SEIR) is a mid-ocean ridge in the southern Indian Ocean.A divergent tectonic plate boundary stretching almost 6,000 km (3,700 mi) between the Rodrigues triple junction) in the Indian Ocean and the Macquarie triple junction) in the Pacific Ocean, the SEIR forms the plate boundary between the Australian and ...
The Burckle crater is an undersea topographic feature about 29 kilometres (18 mi; 16 nmi) in diameter [1] in the southwestern Indian Ocean. A team of Earth scientists called the Holocene Impact Working Group proposes the feature to be an impact crater ; these claims are disputed by other geologists .
Plate tectonics is a scientific theory developed in the 1960s that explains major land form events, such as mountain building, volcanoes, earthquakes, and mid-ocean ridge systems. [26] The idea is that Earth's most outer layer, known as the lithosphere, that is made up of the crust and mantle is divided into extensive plates of rock.
Bathymetry of the Kerguelen Plateau Location of the plateau – the white spot is Kerguelen Island. The Kerguelen Plateau (/ ˈ k ɜːr ɡ əl ən /, / k ər ˈ ɡ eɪ l ən /), [1] also known as the Kerguelen–Heard Plateau, [2] is an oceanic plateau and large igneous province (LIP) located on the Antarctic Plate, in the southern Indian Ocean. [3]
The Rodrigues triple junction viewed from south. Note the "wake" of the eastward propagating triple junction. The Rodrigues triple junction (RTJ), also known as the central Indian [Ocean] triple junction (CITJ) is a geologic triple junction in the southern Indian Ocean where three tectonic plates meet: the African plate, the Indo-Australian plate, and the Antarctic plate.