They are concentrated in certain zones where tectonic plates rub against one another.
I hope this helps!
After studying the photograph above, the chemical formula that will show the composition for the most common mineral that will be found in the rock unit 3 is CaMg (CO3)2. I can't seem to make my keyboard make the numbers smaller. So 3 and 2 should be very small. Sorry about that. I tried to paste the numbers, but it wouldn't let me.
Noo………………………..I don’t understand
Answer:
Una roca preexistente expuesta en la superficie de la tierra pasa por un Proceso Sedimentario (erosión o intemperismo, transporte, depósito, compactación y diagénesis) con el que llega a convertirse en una roca sedimentaria; a esta transformación se le conoce como litificación.