This brief discussion of the development of the Geologic Time Scale begins with Nicolas Steno in 1669 whose ideas have become known as the principles of original horizontal deposition and superposition. Next are James Hutton in 1795 and Charles Lyell in the early 1800s who supported the principle of uniformitarianism. The work of William Smith and the principle of faunal succession is also noted. The site goes on to explain how and why the scale is divided as it is.
This description of a site outside SERC has not been vetted by SERC staff and may be incomplete or incorrect. If you
have information we can use to flesh out or correct this record let us know.
Subject: Geoscience:Geology:Sedimentary Geology, Geoscience:Paleontology Resource Type: Scientific Resources:Overview/Reference Work Grade Level: High School (9-12), Middle (6-8), Informal Earth System Topics: Time/Earth History Topics: Earth surface:Sedimentary Geology, Human Dimensions/Resources, Time/Earth History Theme: Teach the Earth:Teaching Environments:Intro Geoscience, Teach the Earth:Course Topics:Sedimentary Geology, Paleontology
CMS authors: link to this resource in your page using [resource 23367]