📖 what
What is a volcanic arc?
Quick Answer
A volcanic arc is a chain of volcanoes that forms above a subduction zone. It usually runs parallel to a deep ocean trench.
The Full Story
As an oceanic plate sinks into the mantle, water and other volatiles help generate magma that rises through the overriding plate. This creates a curved line of volcanoes called a volcanic arc, such as the Andes in South America or the island arcs of Japan and the Aleutians. The curvature reflects the shape of the subducting plate and the geometry of the plate boundary. Volcanic arcs are among the most active and dangerous volcanic regions on Earth.
Key Facts
1.Forms above a subduction zone
2.Runs parallel to an ocean trench
3.Examples include the Andes and Japan
YouTube Angle
Suggested video title for this topic:
"Why some volcanoes line up in sweeping chains"
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