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Plate Tectonics. A thread

The age of oceanic crust is a nice map of the world's divergent plate boundaries. As the plates move apart, magma rises from the mantle, creating new crust.

Pacific centred for those not in Europe

Overlaying earthquakes locations maps the plate boundaries.

Pacific centred

What about volcanoes?

Pacific centred

Finally. Showing the age of oceanic crust alongside volcanoes in East Asia shows the subduction boundary where the oceanic Pacific Plate and Philippine Sea Plate subduct (dive) beneath the continental Eurasian Plate.