As one tectonic plate moves under its adjoining plate, what happens?

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The process of one tectonic plate sliding under another is called subduction. Generally subduction zones are areas with lots of earthquake activity, especially deep earthquakes.

Because the plates are coming together into the same space, there is a lot of compression happening at the subduction zone. The plate that is...

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The process of one tectonic plate sliding under another is called subduction. Generally subduction zones are areas with lots of earthquake activity, especially deep earthquakes.

Because the plates are coming together into the same space, there is a lot of compression happening at the subduction zone. The plate that is driven down into the earth is melted and its material is incorporated into the mantle and recycled.

In some cases the interaction of the plates results in the uplifting of the upper plate in a mountain-building process known as orogeny.

You can find a number of excellent animations that will help you understand these processes at this link.

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