An ocean plate is subducting if it is flowing under a less dense plate at a convergent plate boundary.
No. While only oceanic crust can subduct it is not always subducting. When two oceanic plates converge, only one of them subducts.
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Nazca
as the subducting plate skins into the mantle, friction between the mantle and lithosphere will oppose plate motion.
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Nazca
The nazca plate
When one plate moves under the other plate
It is subducting.
No. While only oceanic crust can subduct it is not always subducting. When two oceanic plates converge, only one of them subducts.
north american
Convergent with the oceanic plate subducting under the continental plate.
The Ring of Fire (Pacific Ring of Fire) is an area of Pacific Plate subduction, rimming (of course) the Pacific Ocean. The plate subduction creates a line of volcanism geographically around its perimeter that appears to form a circle or ring. The Ring of Fire is the subducting plate boundary of the shrinking Pacific Ocean. The subducting oceanic crust is being drawn under less dense oceanic and continental crust and is melting into the upper mantle which can lead to volcanism and earthquakes.
If an island is on a subducting plate and close to the area of subduction, it will gradually sink as it moves towards the trench. If the island is on the plate under which the other plate is subducting, it will experience many earthquakes and volcanic eruptions.
Tonga
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