That "hot" material can partially melt because the melting temperatures of rocks decrease as the pressure (caused by the weight of the overlying rocks) decreases.
(That "hot" material; can melt; because the melting temperatures of rocks decrease as the pressure (caused by the weight of the overlying rocks) decreases; T:partially) (the melting temperatures of rocks; decrease; ) (the pressure; caused; by the weight of the overlying rocks) (the pressure (caused by the weight of the overlying rocks); decreases; )
That "hot" material the melting temperatures of rocks the pressure the pressure (caused by the weight of the overlying rocks)
can melt decrease caused decreases
because the melting temperatures of rocks decrease as the pressure (caused by the weight of the overlying rocks) decreases T:partially
by the weight of the overlying rocks