Not exactly. It gives us a clue as to where those units are. Once people go on the ground, they observe those rocks and determine that they're the right kinds of rocks to host nickel potential. Then you can use this kind of information to extrapolate into relatively unknown areas and say that what we saw there was purple on this map, so those purple units probably go off in that direction. That allows us to get more value from our observations; we can extend those observations out.
On October 19th, 2011. See this statement in context.