It's rocks and it has to do with finding oil. I don't really care about rocks, and all the oil has been found already. Well, if that is what you think geology is, do I have a surprise for you.
Geology is much, much more.
If you had an earth science course in high school, you will find this course to be much different. If you did not have an earth science course, then excitement awaits you. This geology course is organized around a systems' approach. This approach is driven by the fundamentals of physics and chemistry. We use these sciences for background and explanation of how the processes work.