Triple Junction - John Seach

Triple Junction - John Seach

A triple junction is a place of complex tectonic plate interations.
It occurs when an oceanic ridge (spreading plate boundary) crosses a subduction zone.
This results in a great variety of volcanic rocks.

Examples of Triple Junctions

Active
Woodlark Basin (Solomon Islands)
Mendocino Triple Junction (NW USA)
Chile Triple Junction
Rivera Triple Junction (Mexico)

Ancient
Kula-Faralon (Aleutian Islands)
Kula-Pacific Ridge (Japan)

Kavachi underwater volcano (Solomon Islands) is an example of a volcano at a triple junction.