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The Indian Ocean covers 70,560,000 km 2 (27,240,000 sq mi), including the Red Sea and the Persian Gulf but excluding the Southern Ocean, or 19.5% of the world's oceans; its volume is 264,000,000 km 3 (63,000,000 cu mi) or 19.8% of the world's oceans' volume; it has an average depth of 3,741 m (12,274 ft) and a maximum depth of 7,290 m (23,920 ft).
The Sunda Trench, earlier known as and sometimes still indicated as the Java Trench, [1] is an oceanic trench located in the Indian Ocean near Sumatra, formed where the Australian-Capricorn plates subduct under a part of the Eurasian plate. It is 3,200 kilometres (2,000 mi) long with a maximum depth of 7,290 metres (23,920 feet). [2]
2019 bathymetry Diamantina Trench. The Dordrecht Deep is located in the Diamantina Trench southwest of Perth, Western Australia.The Diamantina Trench is in the eastern part of the larger Diamantina fracture zone, which stretches 1,900 kilometres (1,200 mi) [1] from the Ninety East Ridge to the Naturaliste Plateau, off the lower part of Southwest Australia.
Topographic maps display elevation above ground and are complementary to bathymetric charts. Bathymeric charts showcase depth using a series of lines and points at equal intervals, called depth contours or isobaths (a type of contour line). A closed shape with increasingly smaller shapes inside of it can indicate an ocean trench or a seamount ...
There are about 50,000 km (31,000 mi) of oceanic trenches worldwide, mostly around the Pacific Ocean, but also in the eastern Indian Ocean and a few other locations. The greatest ocean depth measured is in the Challenger Deep of the Mariana Trench, at a depth of 10,994 m (36,070 ft) below sea level.
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 ...
The Diamantina fracture zone (DFZ, Diamantina zone) [1] [2] [3] is an area of the south-eastern Indian Ocean seafloor, consisting of a range of ridges and trenches. [4] It lies to the south of the mideastern Indian Ocean features of the Wharton Basin and Perth Basin, and to the south west of the Naturaliste Plateau.
Wharton Basin is the marine area of the north east quarter of the Indian Ocean. It is named after William Wharton (1843–1905), Hydrographer of the Navy. Alternative names are Cocos Basin (after the Cocos Islands) and West Australian Basin. [1] It lies east of the Ninety East Ridge and west of Western Australia.