Earth is composed of four main layers, starting with an inner core at the planet's center, enveloped by the outer core, mantle, and crust. The inner core is a solid sphere made of iron and nickel metals about 759 miles (1,221 kilometers) in radius.
source: nasa
Carbonate rocks, like limestone <span><span>dolomite's, and chalk on earth</span> </span>
The upward wind or wind in general
the answer to your question is called a destructive plate boundary. this is when the more denser plate goes underneath the lesser dense plate.
<span />
