You don't really hit the major Geology courses until Junior year. Freshman and Sophomore years generally focus on getting the science (Chem, Biol, Phys) and Math (Calc) courses done.
In terms of Geology, freshman year has the fundamental Physical/Historical classes + labs. Sophomore year is usually Mineralogy plus maybe an elective or sometimes a petrology class. The rest of the classes come Junior/Senior years, and field camp is generally between Jr/Sr years.
Of course, it varies by school, but this is the most common scenario I've seen.