Crust is destroyed (or recycled!) at convergent plate boundaries. Usually between oceanic and continental plates where subduction of the more dense oceanic crust occurs.
Because either one plate is pushed downward into the mantle, where it melts, or two plates of similar density crush together, fusing the rocks from either side into one mass. The Himalayas have many fine examples of the latter scenario, though I think your question was more about the first.
recessive plate boundary
An image made by printing the remaining ink on a plate onto paper after it has been destroyed is called a "cancellation proof." This process creates a unique print that can serve as a record of the plate's existence.
Old ocean floor is destroyed and absorbed by the Earth at subduction zones, where tectonic plates collide and one plate is forced beneath the other. The remelting occurs beneath volcanic arcs, where the subducted crust melts and rises to the surface as magma, leading to the formation of new crust.
Subduction boundaries, where one tectonic plate is forced below another, can destroy crust as the subducting plate melts and is absorbed into the mantle. This process can lead to the recycling of crustal material back into the Earth's interior.
I believe it is destoryed along a convergent plate boundry where one plate slides underneath another.
Oceanic crust isn't destroyed because it's old; it is, in fact, destroyed due to destructive plate boundaries. This is where a continental plate and an oceanic plate move towards each other. As the oceanic crust is denser, it is pushed under the continental plate. Here it is forced into the mantle of the earth, where it is destroyed due to heat and convection currents.
Because either one plate is pushed downward into the mantle, where it melts, or two plates of similar density crush together, fusing the rocks from either side into one mass. The Himalayas have many fine examples of the latter scenario, though I think your question was more about the first.
Old crust can be destroyed bysubduction, or the pushing down of an oceanic plate below anoverriding plate at a convergent boundary. The initial phase of adivergent boundary is a rift valley, which progresses to form anoceanic basin with a mid-oceanic ridge.
The plate boundary where oceanic crust is destroyed is a subduction zone. In this process, one tectonic plate is forced beneath another into the Earth's mantle. As the descending plate moves deeper into the mantle, it is eventually melted down and destroyed.
The answer depends on the material of the plate and the density of that material.
recessive plate boundary
At divergent plate boundaries, crust is formed through the process of seafloor spreading. At convergent plate boundaries, crust is often destroyed through subduction, where one plate is forced beneath another into the mantle. At transform plate boundaries, crust is neither created nor destroyed, as the plates slide past each other horizontally.
they are crushed
The material the mounting plate is made of is plated steel. To provide stability in the product.
Continental Plates are made of old rocks because they are never created or destroyed. For example, when an earthquake occurs, it can be caused by one tectonic plate going underneath another. The plate that goes underneath is always an oceanic plate because the rock is of a higher density. So, in summary, continental plates are lighter than oceanic crust, so they are never destroyed (hence why they are made of old rock).
An image made by printing the remaining ink on a plate onto paper after it has been destroyed is called a "cancellation proof." This process creates a unique print that can serve as a record of the plate's existence.