What is uniformitarism?

Answer 1

Uniformitarism states that erosion occured very slowly and at the same rate.

Answer 2

Uniformitarianism is the principle that the same geological processes that operate today have been shaping the Earth's surface over long periods of time. This concept suggests that the Earth's landscape has been slowly molded by gradual, ongoing processes rather than sudden catastrophic events. It is a foundational idea in geology and helps scientists interpret past geological events based on present-day observations.