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What caused the Mariana Trench?

The Mariana Trench. This trench was produced by subduction, a process caused by the collision between the continental lithosphere and the oceanic lithosphere, that caused that the oceanic lithosphere is forced down into the mantle, and there, it’s destroyed because it melts with the magma. As a result by this subduction process,...

Is the Mariana Trench bigger than Mount Everest?

By comparison, Mount Everest stands at 29,026 feet (8,848 m) above sea level, meaning the deepest part of the Mariana Trench is 7,044 feet (2,147 m) deeper than Everest is tall. The Mariana Trench is 1,580 miles (2,542 kilometers) long — more than five times the length of the Grand Canyon.

What was the Mariana Trench named after?

The Mariana Trench is named for the nearby Mariana Islands (in turn named Las Marianas in honor of Spanish Queen Mariana of Austria, widow of Philip IV of Spain). The islands are part of the island arc that is formed on an over-riding plate, called the Mariana Plate (also named for the islands), on the western side of the trench.

Why is the Mariana Trench so deep?

One reason the Mariana Trench is so deep, he added, is because the western Pacific is home to some of the oldest seafloor in the world—about 180 million years old. Seafloor is formed as lava at mid-ocean ridges.

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