well, there's two things. one, it's a convergent plate boundary, and two, it's called subduction when one plate goes under.
A convergent boundary!
Volcanic mountains over hot spots in the mantle. Fault-block
It indicates the presence of a divergent tectonic plate boundary where new crust is being formed.
A tectonic boundary where two oceanic lithospheric plates are either moving away from one another and new crust is formed, or moving toward each other, in which the more dense oceanic plate will subduct beneath the less dense plate.
The island-arc volcanoes are formed from the subduction of an oceanic tectonic plate under another tectonic plate, and often parallel an oceanic trench.
This kind of boundary is mountainous.
one talc
A convergent boundary!
a divergent boundary
is formed at a divergent plate boundary
Volcanic mountains over hot spots in the mantle. Fault-block
It has several! For example the Himalayas are formed due to the collision of the Indian and Eurasian tectonic plates.
The mid-ocean ridge is formed along a divergent or constructive plate boundary between two plates of oceanic crust.
It indicates the presence of a divergent tectonic plate boundary where new crust is being formed.
A tectonic boundary where two oceanic lithospheric plates are either moving away from one another and new crust is formed, or moving toward each other, in which the more dense oceanic plate will subduct beneath the less dense plate.
The island-arc volcanoes are formed from the subduction of an oceanic tectonic plate under another tectonic plate, and often parallel an oceanic trench.
It is called plate boundarys :P