For the earth part of the Elements cycle I was looking for a heavy, strong base for the whole tune, for obvious reasons. Think heavy earthworks, flowing magma.
Achieved is this by using a, well, heavy, strong bass line, that doesn't mock around and stays where it is, accompanied by the pitch shifted percussion, that goes down as well. Not too complicated to see the thought behind it. :)
The melodic bits and parts, if looking for influences, today remind me very strongly of Alan Parsons music - I assume because of the E-Piano bits and how they are played.