The earth���s is broken up into a bunch of discrete pieces, called plates that move around the surface of the planet. asthenosphere geosphere lithosphere mesosphere

So  if  the sum of the enthalpies of the reactants is greater than the products, the  reaction  will be  exothermic.  if  the products side has a larger enthalpy, the  reaction  is  endothermic. you may wonder why  endothermic reactions, which soak up energy or enthalpy from the environment, even happen

Answermost of the time it would be ground into fine sediment,and sometimes they are carried away from the original location;