In a parallel dimension where not only apes evolved into a dominant and intelligent species, technology far surpasses our current level. There are four main dominating factions in the known universe.
When a colony is created on a planet that has Mithrillite, these structures are erected to bring the valuble crystal to the serface. This allows special colecting vehicles to pick it up from the ground, before heading back to the refineing center.
So its kinda like red alert style harvesting?
If you mean by haveing a mine at the center of a field, then yes it is.
Mithrillite is inorganic and has to be mined from the earth, whereas tiberium grows gtom it.
This MOD is A good MOD too ...