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The edge of the plate will heat up and become part of the molten mantle.
As the leading edge in forced down it is heated up and becomes part of the molten magma below.
Subduction.
Volcanoes are common on this type of plate boundary
with a cross-section photo of the sideways and downward movement of the edge of a plate of the earth's crust into the mantle beneath another plate
The edge of the plate will heat up and become part of the molten mantle.
As the leading edge in forced down it is heated up and becomes part of the molten magma below.
It melts (and may float upward).
Allegheny Ludlum makes continuous mill plate steel
Subduction.
It appears to be continuous because it is a cycle. Old plate is subducted, but new plates are formed.
A destructive plate boundary.
Plate tectonics is a continuous process of individual plate movements involving the entire lithosphere.
A tetonic plate can ram into another plate and shift downward underneath the other plate. This causes a subduction zone and moutains, for example the Himalayas or the Andes
Metamorphic rock i think?
It Shows Continuous Duty...
plastron