Subduction

Definition

Subduction is the process where one tectonic plate moves under another and sinks into the mantle. It plays a crucial role in recycling Earth's crust and influencing geological activity.

5 Must Know Facts For Your Next Test

1. Subduction zones are often associated with volcanic activity and earthquakes.
2. Subduction contributes to the formation of oceanic trenches, which are some of the deepest parts of the ocean.
3. This process is integral to the carbon cycle by facilitating the movement of carbon-rich sediments into the mantle.
4. Subducted plates eventually melt and can lead to magma formation, which may cause volcanic eruptions.
5. The interaction between subducting plates can significantly impact nutrient cycling in marine ecosystems.

Review Questions

• What geological features are commonly found at subduction zones?
• How does subduction influence biogeochemical cycles, especially the carbon cycle?
• What role does subduction play in volcanic activity?

Related terms

Plate Tectonics: A scientific theory describing the large-scale motion of Earth's lithosphere.

Oceanic Trench: A deep underwater trench formed by subduction.

Mantle: The layer of Earth located between the crust and the core involved in tectonic plate movements.