The site provides background information about stratigraphic principles and relative time, biostratigraphy (using fossils for relative dating), and radiometric dating.
The site also provides fact sheets on the age of the Earth and isochron dating.
Some fossils, called index fossils, are particularly useful in correlating rocks.
For a fossil to be a good index fossil, it needs to have lived during one specific time period, be easy to identify and have been abundant and found in many places. If you find ammonites in a rock in the South Island and also in a rock in the North Island, you can say that both rocks are Mesozoic.
Play a game that tests your ability to match the percentage of the dating element that remains to the age of the object.
You can tell if it was before or after the other fossils.
An alternative interpretation of the conscious dating melbourne carbon-14 data is that the earth experienced a global flood catastrophe which laid down most of the rock strata and fossils.
The first radiometric dates, generated about 1920, showed that the Earth was hundreds of millions, or billions, of years old.Learn about different types of radiometric dating, such as carbon dating.Understand how decay and half life work to enable radiometric dating.Relative dating does not provide actual numerical dates for the rocks.Fossils are important for working out the relative ages of sedimentary rocks.Some of the most useful fossils for dating purposes are very small ones.