Chapter 1. Introduction to Geology
![Badlands in southern Saskatchewan. Erosion has exposed layers of rock going back more than 65 million years.](https://pressbooks.bccampus.ca/physicalgeologyh5p/wp-content/uploads/sites/1304/2019/12/SK_badlands.png)
Chapter Goals
Complete this chapter so you can:
- Explain what geology is, and why we study Earth.
- Describe the kinds of work geologists do.
- Explain what geological time is.
- Explain how the principle of uniformitarianism allows us to translate observations about Earth today into knowledge about how Earth worked in the past.
- Summarize the main idea behind the theory of plate tectonics.