Boundary or interface.
Convergent boundary's.
contact
A front
a front
convergent
Interface
Surface Wave (APEX)
Convergent boundary's.
As a mixture is a combination of two or more materials, each of the materials is a phase and then there is the boundary between the materials, the interphase.
contact
A front
The question is too vague for a definitive answer; depending on context, "surface", "interface", or even just "boundary" might be used.
h
The boarder between two plates is called a boundary.
true
contact
A front