Uncovering Earth's Birthday
作者：Jason Greenwald
1. Nice work, Jason. I would've liked to see some specific topics listed. For example, for types of rocks, you should've listed each of the types. Otherwise, good job! I LOVE "Geology Celebrities"!
2. Geology Celebrities
2.1. James Hutton
2.1.1. Some rocks at one point were molten
2.2. Charles Lyell
2.2.1. Principle of Uniformitarianism
2.3. Harold Urey
2.3.1. Isotopes to determine water temperatures in the past
2.4. Nicolas Steno
2.4.1. Scientific study of sedimentary rock strata
2.5. William Smith
2.5.1. fossils show evoluton
2.6. Ernest Rutherford
2.6.1. Using radioactivity to determine age
2.7. MIT
2.7.1. using volcanic ash to age date
3. Evolution of Age Dating
3.1. Fossils
3.2. Sedimentary Strata
3.3. Isotopes
3.4. Radioactivity
3.4.1. Carbon dating
3.4.2. Zircon
3.4.3. Uranium-Lead
3.4.4. Potassium-argon