So what is the answer.

the plateau is likely to turn into a desert do to corrosion.

because growing process had stoped after 4-5 year

igneous rocks also form where plates converge. the subducting plate melts as it sinks into the crust of the earth, and the melt rises into the overriding plate forming volcanoes. metamorphic rocks are formed mainly in the lithosphere, wherever there is high pressure and high temperature. -woods