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Taiwan,[II][k] officially the Republic of China (ROC),[I][l] is a country[27] in East Asia.[o] It is located at the junction of the East and South China Seas in the northwestern Pacific Ocean, with the People's Republic of China (PRC) to the northwest, Japan to the northeast, and the Philippines to the south. The territories controlled by the ...
Polynesia is one of three major cultural areas of the Pacific Ocean islands, along with Melanesia and Micronesia. Subregions ( Melanesia, Micronesia, Polynesia, and Australasia ), as well as sovereign and dependent islands of Oceania. Polynesia is generally defined as the islands within the Polynesian Triangle.
Wikipedia is a free content online encyclopedia written and maintained by a community of volunteers, known as Wikipedians, through open collaboration and the wiki software MediaWiki.Wikipedia is the largest and most-read reference work in history, and is consistently ranked among the ten most visited websites; as of April 2024, it was ranked fourth by Semrush, and seventh by Similarweb.
- Etymology
- Geology
- Research History
- Life
- Possible Nuclear Waste Disposal Site
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The Mariana Trench is named after the nearby Mariana Islands, which are named Las Marianas in honor of Spanish Queen Mariana of Austria. The islands are part of the island arcthat is formed on an over-riding plate, called the Mariana Plate (also named for the islands), on the western side of the trench.
The Mariana Trench is part of the Izu–Bonin–Mariana subduction system that forms the boundary between two tectonic plates. In this system, the western edge of one plate, the Pacific Plate, is subducted (i.e., thrust) beneath the smaller Mariana Plate that lies to the west. Crustal material at the western edge of the Pacific Plate is some of the old...
The trench was first sounded during the Challenger expedition in 1875 using a weighted rope, which recorded a depth of 4,475 fathoms (8,184 metres; 26,850 feet). In 1877, a map was published called Tiefenkarte des Grossen Ozeans ("Depth map of the Great Ocean") by Petermann, which showed a Challenger Tief ("Challenger deep") at the location of that...
The expedition conducted in 1960 claimed to have observed, with great surprise because of the high pressure, large creatures living at the bottom, such as a flatfish about 30 cm (12 in) long, and shrimp. According to Piccard, "The bottom appeared light and clear, a waste of firm diatomaceous ooze". Many marine biologists are now skeptical of the su...
Like other oceanic trenches, the Mariana Trench has been proposed as a site for nuclear waste disposal in the hope that tectonic plate subduction occurring at the site might eventually push the nuclear waste deep into the Earth's mantle, the second layer of the Earth. However, ocean dumping of nuclear waste is prohibited by international law. Furth...
Marianas Trench Marine National Monument, United States national monument at the trench. This National Monument protects 246,610 square kilometres (95,216 sq mi) of submerged lands and waters of th...Mariana Trench Dive (25 March 2012) – Deepsea ChallengerMariana Trench Dive (23 January 1960) – Trieste(Newsreel)Mariana Trench Dive (50th Anniv) Archived 3 June 2013 at the Wayback Machine – Trieste – Capt Don WalshThe Caspian Sea is the world's largest inland body of water, often described as the world's largest lake and sometimes referred to as a full-fledged sea.
A tsunami ( / ( t) suːˈnɑːmi, ( t) sʊˈ -/ (t)soo-NAH-mee, (t)suu-; [1] [2] [3] [4] from Japanese: 津波, lit. 'harbour wave', [5] pronounced [tsɯnami]) is a series of waves in a water body caused by the displacement of a large volume of water, generally in an ocean or a large lake.
Tanzania, [c] officially the United Republic of Tanzania, [d] is a country in East Africa within the African Great Lakes region. It is bordered by Uganda to the northwest; Kenya to the northeast; the Indian Ocean to the east; Mozambique and Malawi to the south; Zambia to the southwest; and Rwanda, Burundi, and the Democratic Republic of the ...
