Geology and Geography are different things. Geology isn't typically offered at schools because it is more of a niche subject.Meh. Never did nor was offered "geology" at school so it's not a subject to me. Used to be called "geography" of course.
Unless you are fielding on a gravel track, I'm not sure how much difference between different outfields really has on a ball compared to the pitch. Turf is turf at the end of the day and the ball is just rolling along it rather than impacting harshly against it as on the pitch.