The crustal movement of the plates in the earth are not
completely understood by scientist and considered a phenomenon. It
is an accepted theory that the strength of the water in contrast to
the weakness of the land make the movement of the plates.
They are geologic features because when the crustal plates move
its makes cracks on earth the the mountains are one because
everytime the crustal plates move it breaks the earths surface and
the dirt and rocks start gathering together