anyone who has majored in geology, please give tips, advice, warnings, pros, cons
Take every field trip that you can. A geologist builds a library of features to look for in the rocks, and guided trips are the way to do it.
If the opportunities arise to attend conferences, take them. You might find some of the talks are above you. If nothing else, those will prepare you to make connections when you formally study the material in class.
I also recommend that you not skimp on chemistry. Get all you can out of required courses and consider going beyond the requirements.
Study your minerals and chemical components, focus on plate tectonics, groundwater, waves, crustal formation, composition of Earth-This can all be applied to space science and planetary geology. There is a lot more to it than just studying rocks, it is a whole wonderful new world.
There are no cons, only pros. Go for it.
Sounds cliche but find something you like to do. You should definitely find opportunities to go into the field during the summer months either with grad students, professors or some sort of internship program (this is when proffesors and grad students will be most active in gathering raw data for their research). Talk with your advisor about job openings in the department, scholarships, undergraduate project, and graduate school guidance.
A solid grasp on the classic fundamentals is a must as is the ability to write concisely and technically. Though, as the bulk of geological work is in either mining and mineral exploration, skills that will give you a head start for these fields is what will give you the edge.
+ Learn about the different mineralisation styles, genetic models, temporal and spatial distribution and lithological and tectonic associations.
+ Mineral and rock identification skills are a must and if you can learn what weathered rocks look like as most of the stuff you see sticking out of the ground in areas that have not undergone recent continental glaciation will be often highly weathered.
+ make sure you learn your sulphide species and their weathered products.
+ A good understanding of structural geology is also a very good tool to have.
+ A good understanding of geophysical methods and their application is very useful.
+ A good understanding of regolith and regolith processes is necessary for an exploration geologist.