Here's why:

* Uniformitarianism: Hutton is best known for his principle of uniformitarianism, which states that the geological processes we see today are the same processes that have shaped the Earth in the past. This was a revolutionary idea, as it moved away from the then-prevalent idea of catastrophism (that the Earth was formed by sudden, catastrophic events).

* Deep Time: Hutton's work helped to establish the concept of "deep time," meaning that the Earth is incredibly old, far older than previously thought.

* Rock Cycle: Hutton recognized the cyclical nature of geological processes, describing the rock cycle and how rocks are constantly transformed from one type to another.

While other scientists made important contributions to the field, Hutton's work laid the foundation for modern geology as a scientific discipline. He provided a framework for understanding the Earth's history and processes that is still used today.