The Mariana Trench, in the South Pacific Ocean, is formed as the mighty Pacific plate subducts beneath the smaller, less-dense Philippine plate. In a subduction zone, some of the molten material—the former seafloor—can rise through volcanoes located near the trench.
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What are some famous trenches?
Marianas Trench
If you’re looking for the deepest oceanic trench in the world, look no further than the western Pacific Ocean just east of the Mariana Islands. The Marianas or Mariana Trench reaches a maximum known depth of 11,034 meters as measured by a Soviet vessel in 1957.
What is a trench in the Earth?
Trenches are long, narrow depressions on the seafloor that form at the boundary of tectonic plates where one plate is pushed, or subducts, beneath another.
Where is one example of a deep ocean trench?
The Mariana Trench or Marianas Trench is located in the western Pacific Ocean about 200 kilometres (124 mi) east of the Mariana Islands; it is the deepest oceanic trench on Earth. It is crescent-shaped and measures about 2,550 km (1,580 mi) in length and 69 km (43 mi) in width.
Where can a trench be found?
Trenches are found on the floor of the sea; however, their common name is deep ocean trenches because they are more often found in the deepest areas of the ocean. Trenches are formed in subduction zones where tectonic plates collide.
What is the biggest trench in the world?
The Mariana Trench
The Mariana Trench, in the Pacific Ocean, is the deepest location on Earth. According to the Exclusive Economic Zone (EEZ), the United States has jurisdiction over the trench and its resources.
How many trenches are in the world?
Globally, there are over 50 major ocean trenches covering an area of 1.9 million km2 or about 0.5% of the oceans. Trenches are geomorphologically distinct from troughs. Troughs are elongated depressions of the sea floor with steep sides and flat bottoms, while trenches are characterized by a V-shaped profile.
What are the 5 ocean trenches?
The Five Deeps Expedition was the first to reach the deepest point in each of the Earth’s five oceans: the Puerto Rico Trench in the Atlantic, South Sandwich Trench in the Southern Ocean, Java Trench in the Indian Ocean, Challenger Deep in the Pacific and Molloy Deep in the Arctic.
Is a trench a hole?
A trench is a type of excavation or in the ground that is generally deeper than it is wide (as opposed to a wider gully, or ditch), and narrow compared with its length (as opposed to a simple hole or pit).
What is an example of an ocean trench?
Ocean trenches exist in all the world’s oceans. They include the Philippine Trench, Tonga Trench, the South Sandwich Trench, the Eurasian Basin and Malloy Deep, the Diamantina Trench, the Puerto Rican Trench, and the Mariana.
Where is the deepest trench in the ocean?
The deepest part of the ocean is called the Challenger Deep and is located beneath the western Pacific Ocean in the southern end of the Mariana Trench, which runs several hundred kilometers southwest of the U.S. territorial island of Guam.
What is the second deepest trench in the world?
The Tonga Trench is an oceanic trench located in the southwestern Pacific Ocean. It is the deepest trench in the Southern hemisphere and the second deepest on Earth after the Mariana Trench.
How many trenches are in the Atlantic Ocean?
three
What is a Trench? At least 22 trenches have been identified although not all are classified as major. Of this number, 18 are in the Pacific Ocean, three in the Atlantic Ocean, and one in the Indian Ocean.
Which ocean is coldest?
The Arctic Ocean
The Arctic Ocean | National Geographic Society.
How deep has a human gone in the ocean?
35,853 feet
Vescovo’s trip to the Challenger Deep, at the southern end of the Pacific Ocean’s Mariana Trench, back in May, was said to be the deepest manned sea dive ever recorded, at 10,927 meters (35,853 feet).
Who went the deepest in the ocean?
To play this video you need to enable JavaScript in your browser. On 23 January 1960, two explorers, US navy lieutenant Don Walsh and Swiss engineer Jacques Piccard, became the first people to dive 11km (seven miles) to the bottom of the Mariana Trench.
What are the deepest trenches on Earth?
- Mariana Trench. The Marina Trench is the deepest part of the Earth’s surface in the western Pacific Ocean.
- Tonga Trench.
- Philippine Trench.
- Kuril- Kamchatka Trench.
- Kermadec Trench.
- Izu-Ogasawara Trench.
- Japan Trench.
- Puerto Rico Trench.
Did trenches have names?
Trench names
Trenches came into widespread use in 1914 as a way for soldiers to protect themselves against the firepower of modern weaponry. Over time, they developed into huge networks. As shown here, trenches were given names to help identify them. Sometimes these names related to familiar places from home.
Why trenches are formed?
In particular, ocean trenches are a feature of convergent plate boundaries, where two or more tectonic plates meet. At many convergent plate boundaries, dense lithosphere melts or slides beneath less-dense lithosphere in a process called subduction, creating a trench.
What is the top 3 deepest ocean?
2.1. 4. Pacific ocean
| Ocean | Area | Location |
|---|---|---|
| Pacific | Mariana Trench | Challenger Deep |
| Indian | Java Trench | Unnamed Deep |
| Southern | South Sandwich Trench | Unnamed Deep South of 60°S |
| Atlantic | Puerto Rico Trench | Milwaukee Deep |
Why is the ocean blue?
The ocean is blue because water absorbs colors in the red part of the light spectrum. Like a filter, this leaves behind colors in the blue part of the light spectrum for us to see. The ocean may also take on green, red, or other hues as light bounces off of floating sediments and particles in the water.