Faith writes:
... to be a geologist and study the rocks is all it takes to learn what's necessary to finding oil, and that doesn't involve OE theory.
If that was true, the oil companies could save a lot of money by hiring high school dropouts instead of geologists and just giving them a Finding Oil for Dummies handbook.
In a way, the OE theory is incidental to finding oil - but to find oil it is necessary to understand how the rocks formed, how they changed after they were formed, etc. Finding oil comes from that understanding and so does the realization that the rocks must be old.