Planning your degree
Once you have declared a major in Geology, finishing the degree efficiently requires careful planning. Note that taking all the prerequisites before the Geology courses is typically not wise. Your advisor can help you plan your way to completion. The resources here are devoted to assisting in that process.
The course-planning website should be a useful tool.
If you are not too far along in your degree, you might look at Dr. Crider's analysis of How to Get a Geology Degree in Four Years.
The set of requirements and prerequisites for the various B.S. Degrees are available in flow-chart form:
The ultimate reference, of course, is the WWU catalog.