Answer;
Uniformitarianism
Explanation;
The principle of Uniformitarianism is the idea that all geological process have operated slowly and in the same manner as they are observed to operate today.
The principle of uniformitarianism is used to date rocks based on the assumptions of uniform process. The principle of uniformitarianism is applied to the organic world as well as the geological world. Darwinian evolution uses the principle of uniformitarianism as the central idea of descent with modification that organisms have evolved by slow gradual uniform changes.
