Ocean Trenches - Mariana Trench Flashcards

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Ocean trenches are deep sections of the ocean where an oceanic plate is usually sinking below a continental plate.

They are formed in the subduction zone as the denser oceanic plate is subjected under the continental plate.

180 million years ago Signup and view all the answers

It is 2550 km long and goes past Guam. Signup and view all the answers

It has an average width of 69 km. Signup and view all the answers

Its maximum known depth is 10,994 km; however, it has previously been measured at 11,030 km. Signup and view all the answers

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Ocean trenches are significant geological features where an oceanic plate sinks beneath a continental plate, creating deep underwater valleys.
The process of ocean trench formation occurs in subduction zones, where the denser oceanic plate is forced downwards.

Notable ocean trenches include:
- Mariana Trench
- Tonga Trench
- Philippine Trench

Ocean trenches are primarily formed through the subduction process, contributing to the dynamic nature of Earth's tectonic plates.

The Mariana Trench was formed approximately 180 million years ago, making it one of the oldest trenches on the planet.
It extends 2,550 km in length, stretching past the island of Guam.
The trench has an average width of 69 km, showcasing its vast expanse underwater.
The maximum known depth of the Mariana Trench is 10,994 meters, although it was previously recorded at 11,030 meters.