Subduction

Key Concepts

1. Convergent Boundaries: Subduction occurs at convergent boundaries where tectonic plates move towards each other.
2. Tectonic Plates: The Earth's crust is divided into tectonic plates, and subduction occurs when one plate is forced beneath another.
3. Oceanic and Continental Plates: Subduction often involves the denser oceanic plate being forced beneath the lighter continental plate.
4. Volcanic Activity: Subduction leads to the formation of volcanic arcs due to the melting of the subducted plate and the release of magma.

Study Guide

• Definition: Subduction is the process of one tectonic plate being forced beneath another at a convergent boundary.
• Causes: Subduction is primarily driven by differences in the densities of the tectonic plates involved.
• Features: Subduction zones are associated with deep ocean trenches, volcanic arcs, and earthquakes.
• Impacts: Subduction has environmental impacts such as volcanic eruptions, seismic activity, and the formation of mountain ranges.
• Examples: Well-known subduction zones include the Pacific Ring of Fire and the Andes Mountains.